Topical subject terms, geographical place names, occupations, and forms of material represented in finding aids. Subjects are selected from controlled lists of words and phrases used by the Library of Congress.
P
- Pacific Area--History.
- Pacific Islands (Trust Territory)--Politics and government.
- Pacific Ocean--Discovery and exploration.
- Pacifism.
- Pacifists.
- Packaging.
- Packard, Jack (Fictitious character).
- Packets.
- Packing-houses--Illinois--Chicago.
- Paducah (Ky.)--History.
- Page proofs (Printing).
- Pageants--New Jersey--Paterson.
- Pageants--Washington (D.C.).
- Painters--United States.
- Painting, American.
- Paintings (Visual works).
- Pakistan--Foreign relations--India.
- Palestine--Commerce.
- Palestine--Description and travel.
- Palestine--Foreign relations--United States.
- Palestine--History.
- Palestine--History--19th century.
- Palestine--History--20th century.
- Palestine--History--Partition, 1947.
- Palestine--Politics and government--1948-.
- Palestine--Social conditions--20th century.
- Palestine--Social life and customs.
- Palmistry.
- Palmists.
- Pamphlets.
- Pan-Africanism.
- Panama Canal (Panama).
- Panama Canal (Panama)--Description and travel.
- Panama Canal (Panama)--History.
- Panama Canal (Panama)--Periodicals.
- Panama Canal (Panama)--Surveys.
- Panama--Colonization.
- Panama--Commerce.
- Panama--Description and travel.
- Panama--Foreign relations--United States.
- Panama--History.
- Panama--History--Revolution, 1903.
- Panama--History--To 1903.
- Panama, Isthmus of (Panama).
- Panama, Isthmus of (Panama)--Discovery and exploration.
- Panama--Politics and government--1903-1946.
- Panama--Social conditions.
- Panoramic photographs--1900-1970.
- Panslavism.
- Papacy--History--1929-1945.
- Paper industry--United States.
- Paper money--United States.
- Paper--Specimens.
- Parachutes.
- Parades & processions--United States--1910-1930.
- Paranoia.
- Paranormal fiction, American.
- Parapsychology.
- Parasitologists.
- Paratroopers.
- Parcel post--United States.
- Paris (France)--Description and travel.
- Paris (France)--History.
- Paris (France)--History--Commune, 1871.
- Paris (France)--History--Siege, 1870-1871.
- Paris (France)--Intellectual life--20th century.
- Paris (France)--Social life and customs.
- Paris (Tenn.)--Social life and customs.
- Parks.
- Parks--Connecticut--Hartford.
- Parks--Design and construction.
- Parks--Maryland--Baltimore.
- Parks--New York (State).
- Parks--New York (State)--Buffalo.
- Parks--New York (State)--New York.
- Parks--Pennsylvania--Jenkintown.
- Parks--Pennsylvania--Philadelphia.
- Parks--Washington (D.C.).
- Parks--Washington (D.C.)--Design and construction.
- Parliamentarians.
- Parliamentary practice.
- Particle accelerators.
- Particles.
- Particles (Nuclear physics).
- Passamaquoddy Bay (N.B. and Me.).
- Patchwork quilts--United States.
- Patent laws and legislation.
- Patent medicines--1830-1900.
- Patent suits--United States.
- Patents.
- Patents--Germany.
- Patents law and legislation.
- Patents--Standards.
- Patents--United States.
- Paterson (N.J.)--Religious life and customs.
- Paterson (N.J.)--Social life and customs.
- Pathologists.
- Patriotic societies--United States.
- Patriotism.
- Patriotism in literature.
- Patriotism--United States.
- Patriots--Ireland.
- Patronage, Political.
- Patronage, Political--United States.
- Pay equity.
- Pay equity--United States.
- Pea Patch Island (Del.)--History.
- Peace.
- Peace-building--Middle East. .
- Peace movements.
- Peace movements--United States.
- Peace--Societies, etc.
- Peace treaties.
- Pearl Harbor (Hawaii), Attack on, 1941.
- Peasants--Caribbean Area.
- Peasants--Haiti.
- Peasants--Montserrat.
- Peninsular Campaign, 1862.
- Penmanship.
- Pennsylvania Avenue (Washington, D.C.).
- Pennsylvania--Commerce.
- Pennsylvania--Commerce--Great Britain.
- Pennsylvania--Commerce--Maryland.
- Pennsylvania--Description and travel.
- Pennsylvania--History.
- Pennsylvania--History--Civil War, 1861-1865.
- Pennsylvania--History--Civil War, 1861-1865--Campaigns.
- Pennsylvania--History--Colonial period, ca. 1600-1775.
- Pennsylvania--Politics and government.
- Pennsylvania--Politics and government--1775-1865.
- Pennsylvania--Politics and government--1861-1865.
- Pennsylvania--Politics and government--1865-1950.
- Pennsylvania--Politics and government--1951.
- Pennsylvania--Politics and government--19th century.
- Pennsylvania--Politics and government--To 1775.
- Pennsylvania--Social life and customs.
- Penobscot Bay (Me.)--Discovery and exploration.
- Penobscot Expedition, 1779.
- Pension trusts--Law and legislation--United States.
- Pension trusts--Taxation--Law and legislation--United States--History.
- Pensions--Government policy--United States.
- Pensions--Law and legislation--United States.
- Pensions--United States.
- Peonage--United States.
- People with disabilities.
- People with disabilities--Employment--United States.
- People with disabilities--Government policy--United States.
- Perception.
- Percussion music--Ghana.
- Percussion music--Morocco.
- PerestroÄka.
- Performing arts.
- Performing arts--Anecdotes.
- Performing arts--United States.
- Periodical editors.
- Periodical editors--United States.
- Periodical editors--Washington (D.C.).
- Periodicals.
- Periodicals--Publishing.
- Periodicals--Publishing--United States.
- Periscopes.
- Perpetual calendars.
- Perryville (Ky.)--History.
- Persian Gulf.
- Persian Gulf--Foreign relations--United States.
- Persian Gulf Region.
- Persian Gulf Region--Foreign relations--United States. .
- Persian Gulf War, 1991.
- Persian Gulf War, 1991--United States--Anecdotes.
- Personality development.
- Peru--Boundaries--Chile.
- Peru--Description and travel.
- Peru--Foreign relations--United States.
- Peru--History.
- Peru--Politics and government--1829-1919.
- Petersburg (Va.)--History--Civil War, 1861-1865.
- Petersburg (Va.)--History--Siege, 1864-1865.
- Petroleum in submerged lands.
- Petroleum industry and trade.
- Petroleum industry and trade--Congresses.
- Petroleum industry and trade--Indiana.
- Petroleum law and legislation--United States.
- Petroleum law and legislation--United States--Cases.
- Petroleum products--Prices--United States.
- Pharmaceutical industry.
- Pharmaceutical industry--Patents.
- Pharmaceutical industry--United States.
- Pharmaceutical policy--United States.
- Pharmacologists.
- Pharmacology.
- Philadelphia (Pa.)--Centennial celebrations, etc.
- Philadelphia (Pa.)--Commerce.
- Philadelphia (Pa.)--Description and travel.
- Philadelphia (Pa.)--History.
- Philadelphia (Pa.)--Politics and government.
- Philadelphia (Pa.)--Religion.
- Philadelphia (Pa.)--Social conditions.
- Philadelphia (Pa.)--Social life and customs.
- Philanthropists.
- Philanthropists--United States--Biography.
- Philippine literature.
- Philippine newspapers.
- Philippines.
- Philippines--Commerce.
- Philippines--Description and travel.
- Philippines--Economic conditions.
- Philippines--Economic conditions--1946-1986.
- Philippines--Foreign relations--United States.
- Philippines--History.
- Philippines--History--1898-1946.
- Philippines--History--Japanese occupation, 1942-1945.
- Philippines--History--Japanese occupation, 1942-1945--Newspapers.
- Philippines--History, Military.
- Philippines--History--Philippine American War, 1899-1902.
- Philippines--History--Revolution, 1896-1898.
- Philippines--Newspapers.
- Philippines--Politics and government.
- Philippines--Politics and government--1898-1935.
- Philippines--Politics and government--1935-1946.
- Philippines--Politics and government--1946-.
- Philippines--Social conditions--20th century.
- Philippines--Social life and customs.
- Philosophers.
- Philosophy.
- Philosophy--Study and teaching.
- Phonocardiography.
- Phonograph--Caricatures and cartoons.
- Phonograph records.
- Phonograph--United States.
- Photocopies.
- Photographers.
- Photographic prints.
- Photographic prints--1860-1970.
- Photographic prints--1880-1970.
- Photographic reconnaissance systems.
- Photographs.
- Photography.
- Photography, Artistic.
- Photography--Middle East.
- Photography, Military--United States.
- Photography of sports.
- Photography--Poland.
- Photography--Political aspects.
- Photography--Social aspects.
- Photography--Studios and dark rooms.
- Photography--United States.
- Photojournalism.
- Photojournalism--United States.
- Photomechanical prints--1880-1940.
- Photomechanical prints--1890-1940.
- Photomechanical prints--1900-1970.
- Phototelegraphy.
- Phyllophaga.
- Physical geography--Virginia.
- Physicians.
- Physicians--Egypt--Cairo.
- Physicians--Employment--Virginia--Richmond.
- Physicians, Foreign--China.
- Physicians--Lebanon.
- Physicians--Malpractice--United States.
- Physicians--United States.
- Physicians--United States--Biography.
- Physicians--United States--Correspondence.
- Physicists.
- Physics.
- Physics--Research.
- Physics--Study and teaching.
- Physics--Washington (D.C.)--Congresses.
- Physiologists.
- Physiology.
- Physiology--Awards.
- Pianists.
- Pianists--Autographs.
- Pianists--Correspondence.
- Pianists--Russia.
- Pianists--United States.
- Piano music.
- Piano music--Interpretation (Phrasing, dynamics, etc.).
- Piano technicians.
- Pictorial rugs.
- Pictorial rugs--Chesapeake Bay Region (Md. and Va.).
- Pictorialism (Photography movement).
- Pictures--2000-2010.
- Piegan Indians--Wars--Montana.
- Piety.
- Pine Ridge Indian Reservation (S.D.).
- Ping shu--China--Yangzhou Shi.
- Pioneer (Space probes).
- Pioneers--Texas--Fort Bend County.
- Pirates.
- Pirates--Caribbean Area.
- Pirates--Mediterranean region.
- Piscataway (Md.)--Commerce.
- Pittsfield (Mass.)--Religious life and customs.
- Plagiarism.
- Plague--Turkey.
- Planets--Exploration.
- Planets--Research.
- Plant diseases.
- Plant pathologists.
- Plantation life--Virginia.
- Plantation owners.
- Plantations.
- Plantations--Florida.
- Plantations--Georgia.
- Plantations--Hawaii.
- Plantations--Louisiana--Saint Charles Parish.
- Plantations--Mississippi.
- Plantations--New York (State)--Kinderhook.
- Plantations--North Carolina--Warrenton.
- Plantations--South Carolina.
- Plantations--South Carolina--Wando.
- Plantations--Tennessee.
- Plantations--Virginia.
- Plantations--Virginia--Charlotte County.
- Plants.
- Plants--1830-1900.
- Plants--Type specimens--Middle East.
- Plants--Washington (D.C.).
- Plastics.
- Playbills.
- Playgrounds.
- Playgrounds--Washington (D.C.).
- Playwrights.
- Playwriting.
- Plazas--New York (State).
- Plea bargaining.
- Pleasant Hill (Ky.)--Religious life and customs.
- Plenas--Puerto Rico.
- Plutonium.
- Plutonium--Storage--United States.
- Poems.
- Poetry.
- Poetry--Awards.
- Poetry, Modern.
- Poetry--Periodicals.
- Poetry--Societies, etc.
- Poetry--Translations.
- Poets.
- Poets, American.
- Poets, American--20th century.
- Poets, American--20th century--Correspondence.
- Poets, Armenian--Correspondence.
- Poets--Correspondence, reminiscences, etc.
- Poets, English--20th century--Biography.
- Poets, Russian--Correspondence.
- Poets, Russian--Societies, etc.--United States.
- Poets, Spanish.
- Poets, Spanish--Correspondence.
- Point Lookout (Md.)--History.
- Poland.
- Poland--Armed Forces.
- Poland--Boundaries.
- Poland--Commerce.
- Poland--Economic conditions--1918-1945.
- Poland--Economic conditions--1945-1981.
- Poland--Economic policy--1918-1945.
- Poland--Foreign relations--Canada. .
- Poland--Foreign relations--Germany.
- Poland--Foreign relations--United States.
- Poland--History--1918-1945.
- Poland--History--20th century.
- Poland--History--Pictorial works.
- Poland--Officials and employees--20th century.
- Poland--Politics and government--1918-1945.
- Poland--Politics and government--1945-1980.
- Poland--Social conditions--1945-.
- Poland--Societies, etc.
- Polar regions--Aerial exploration.
- Polar regions--Discovery and exploration.
- Police administration--New York (State)--New York.
- Police administration--New York (State)--New York--History--19th century.
- Police administration--Philippines.
- Police brutality--United States.
- Police commissioners.
- Police--Philippines.
- Police questioning--United States.
- Police--United States.
- Polish Americans--Employment--New Jersey--Paterson.
- Polish Americans--Illinois--Music.
- Polish Americans--Music.
- Polish people--Austria.
- Polish people--Autographs.
- Political activists.
- Political ballads and songs.
- Political ballads and songs--United States--Texts.
- Political campaigns.
- Political campaigns--California.
- Political campaigns--Massachusetts.
- Political campaigns--New York (State).
- Political campaigns--Pennsylvania.
- Political campaigns--United States.
- Political campaigns--Wisconsin.
- Political candidates--United States.
- Political cartoons.
- Political clubs.
- Political commentators.
- Political consultants.
- Political consultants--New York (State)--New York--Archives.
- Political consultants--United States.
- Political conventions.
- Political conventions--Maryland--Baltimore.
- Political corruption.
- Political corruption--Georgia.
- Political corruption--New Mexico.
- Political corruption--New York (State)--New York.
- Political corruption--United States.
- Political crimes and offenses--Investigation--United States.
- Political culture--United States.
- Political ethics.
- Political participation--United States.
- Political parties.
- Political parties--Great Britain.
- Political parties--Mississippi.
- Political parties--United States.
- Political parties--Wisconsin.
- Political planning.
- Political prisoners--Puerto Rico.
- Political refugees--Germany.
- Political refugees--United States.
- Political science.
- Political science--Periodicals.
- Political science--Philosophy.
- Political science--Study and teaching--United States.
- Political science--United States.
- Political scientists.
- Political scientists--United States.
- Politicians.
- Politicians--1940-1970.
- Politicians--Autographs.
- Politicians--California--Interviews.
- Politicians--Correspondence.
- Politicians--Great Britain--Autographs.
- Politicians--United States.
- Politicians--United States--Autographs.
- Politicians--United States--Biography.
- Politicians--United States--Correspondence.
- Politicians--United States--Social life and customs.
- Politicians--Washington (D.C.).
- Politics, Practical.
- Politics, Practical--Periodicals.
- Politics, Practical--United States.
- Polka (Dance)--Illinois--Chicago.
- Polkas--Illinois--Chicago.
- Poll tax--United States--Law and legislation.
- Polychlorinated biphenyls--Hudson River Valley (N.Y. and N.J.).
- Polygamy.
- Polygamy--United States.
- Polymers.
- Polyvinyl chloride.
- Pomerelia (Poland)--History.
- Pompano Beach (Fla.).
- Pondicherry (India)--Religion.
- Pony express.
- Poor.
- Poor children--United States.
- Poor--Civil rights--United States.
- Poor--New York (State)--New York.
- Poor People's Campaign.
- Poor--United States.
- Popular instrumental music.
- Popular music.
- Popular music--1901-1910.
- Popular music--1911-1920.
- Popular music--1931-1940.
- Popular music--1951-1960.
- Popular music--1961-1970.
- Popular music--Andes Region.
- Popular music--China--Xishuangbanna Daizu Zizhizhou.
- Popular music--Colombia.
- Popular music--Cuba.
- Popular music--Lead sheets.
- Popular music--Mexico--Veracruz-Llave (State).
- Popular music--Morocco.
- Popular music--Puerto Rico.
- Popular music--South America.
- Popular music--To 1901.
- Popular music--United States.
- Popular music--United States--1941-1950.
- Popular music--United States--To 1901.
- Popular music--Writing and publishing--United States.
- Population.
- Population--Congresses.
- Population policy.
- Population--Statistics.
- Pornography.
- Port Tobacco (Md.)--Commerce.
- Portrait painting.
- Portrait painting, American--19th century.
- Portrait photographs.
- Portrait photographs--1840-1940.
- Portrait photographs--1860-1970.
- Portrait photographs--1880-1970.
- Portrait photographs--1900-1970.
- Portrait photographs--1940-1970.
- Portrait photography.
- Portrait photography--United States.
- Portrait prints--1830-1900.
- Portrait prints--1840-1890.
- Portrait sculpture.
- Portraits.
- Portraits--1880-1940.
- Portraits--1900-1970.
- Ports of entry--Washington (D.C.).
- Portsmouth (R.I.)--History.
- Portugal--Commerce--Russia.
- Portugal--Foreign relations--United States.
- Posadas (Social custom)--Rio Grande Valley Region (Colo.-Mexico and Tex.).
- Post-communism.
- Postal rates--United States.
- Postal service--Illinois--Springfield.
- Postal service--International cooperation.
- Postal service--United States.
- Postcards.
- Postcards--1880-1970.
- Posters.
- Posters--1930-1960.
- Postmasters.
- Postmasters--Massachusetts--Boston.
- Potassium--Physiological effect.
- Potomac River--History.
- Potomac River--History--Civil War, 1861-1865.
- Poverty.
- Poverty--United States.
- Power of attorney--United States.
- Power resources--Law and legislation--United States.
- Power resources--United States.
- Power (Social sciences)--Soviet Union.
- Power (Social sciences)--Soviet Union--Psychological aspects.
- Practice of law.
- Practice of law--Africa, West.
- Practice of law--California.
- Practice of law--California--Los Angeles.
- Practice of law--California--San Francisco.
- Practice of law--Connecticut.
- Practice of law--Delaware.
- Practice of law--Hawaii--Honolulu.
- Practice of law--Illinois.
- Practice of law--Illinois--Chicago.
- Practice of law--Illinois--Peoria.
- Practice of law--Illinois--Springfield.
- Practice of law--Indiana.
- Practice of law--Indiana--Evansville.
- Practice of law--Indiana--Indianapolis.
- Practice of law--Kansas--Leavenworth.
- Practice of law--Kentucky.
- Practice of law--Kentucky--Lexington.
- Practice of law--Louisiana.
- Practice of law--Maryland.
- Practice of law--Maryland--Baltimore.
- Practice of law--Massachusetts.
- Practice of law--Massachusetts--Boston.
- Practice of law--Minnesota--Minneapolis.
- Practice of law--New Hampshire.
- Practice of law--New Mexico--Santa Fe.
- Practice of law--New York (State).
- Practice of law--New York (State)--Jamestown.
- Practice of law--New York (State)--New York.
- Practice of law--New York (State)--Rochester.
- Practice of law--Ohio.
- Practice of law--Ohio--Cincinnati.
- Practice of law--Ohio--Cleveland.
- Practice of law--Pennsylvania--Bradford.
- Practice of law--Pennsylvania--Gettysburg.
- Practice of law--Pennsylvania--Philadelphia.
- Practice of law--Tennessee.
- Practice of law--Tennessee--Chattanooga.
- Practice of law--Texas--Galveston.
- Practice of law--Texas--Houston.
- Practice of law--United States.
- Practice of law--Vermont.
- Practice of law--Virginia.
- Practice of law--Washington (D.C.).
- Practice of law--Wyoming--Cheyenne.
- Prayer in the public schools.
- Prayers.
- Pre-trial release.
- Precipitation (Meteorology)--Modification.
- Pregnant women--Employment--Law and legislation--United States.
- Preparatory schools.
- Preparatory schools--Massachusetts--Groton.
- Presbyterian Church.
- Presbyterian Church--Clergy.
- Presbyterian Church--Delaware.
- Presbyterian Church--Doctrines.
- Presbyterian Church--Maryland.
- Presbyterian Church--Massachusetts.
- Presbyterian Church--Michigan--Clergy.
- Presbyterian Church--Missions.
- Presbyterian Church--New York (State)--Clergy.
- Presbyterian Church--New York (State)--New York.
- Presbyterian Church--Pennsylvania--Marsh Creek.
- Presbyterian Church--Pennsylvania--Philadelphia.
- Presbyterian Church--Sermons.
- Presbyterian Church--Virginia.
- Presbyterian Church--Washington (D.C.).
- Presidential advisors.
- Presidential advisors--Russia (Federation).
- Presidential assistants.
- Presidential candidates--United States.
- Presidential candidates--United States--19th century.
- Presidential Scholars.
- Presidential yachts.
- Presidents--Confederate States of America.
- Presidents--Election.
- Presidents--Election--1876.
- Presidents--Election--1896.
- Presidents--Family--Interviews.
- Presidents--Liberia.
- Presidents--Monuments--United States.
- Presidents--Poland--Election. .
- Presidents--Press coverage--United States.
- Presidents--United States.
- Presidents--United States--1830-1880.
- Presidents--United States--Archives.
- Presidents--United States--Autographs.
- Presidents--United States--Biography.
- Presidents--United States--Correspondence.
- Presidents--United States--Election.
- Presidents--United States--Election--1800.
- Presidents--United States--Election--1816.
- Presidents--United States--Election--1824.
- Presidents--United States--Election--1825.
- Presidents--United States--Election--1832.
- Presidents--United States--Election--1836.
- Presidents--United States--Election--1840.
- Presidents--United States--Election--1844.
- Presidents--United States--Election--1852.
- Presidents--United States--Election--1856.
- Presidents--United States--Election--1860.
- Presidents--United States--Election--1864.
- Presidents--United States--Election--1868.
- Presidents--United States--Election--1872.
- Presidents--United States--Election--1876.
- Presidents--United States--Election--1880.
- Presidents--United States--Election--1884.
- Presidents--United States--Election--1888.
- Presidents--United States--Election--1896.
- Presidents--United States--Election--1904.
- Presidents--United States--Election--1912.
- Presidents--United States--Election--1916.
- Presidents--United States--Election--1920.
- Presidents--United States--Election--1924.
- Presidents--United States--Election--1928.
- Presidents--United States--Election--1932.
- Presidents--United States--Election--1936.
- Presidents--United States--Election--1940.
- Presidents--United States--Election--1944.
- Presidents--United States--Election--1948.
- Presidents--United States--Election--1952.
- Presidents--United States--Election--1956.
- Presidents--United States--Election--1960.
- Presidents--United States--Election--1964.
- Presidents--United States--Election--1968.
- Presidents--United States--Election--1972.
- Presidents--United States--Election--1976.
- Presidents--United States--Election--1980.
- Presidents--United States--Election--1988.
- Presidents--United States--Election--1992.
- Presidents--United States--Election--1996.
- Presidents--United States--Inauguration.
- Presidents--United States--Messages.
- Presidents--United States--Portraits.
- Presidents--United States--Staff.
- Presidents--United States--Staff--1969-1974.
- Presidents--United States--Transition periods.
- Presidents' spouses--United States.
- Press and politics--United States.
- Press--Liability (Law).
- Press releases.
- Press secretaries.
- Press--United States.
- Price maintenance--United States.
- Price regulation--United States.
- Primaries--United States.
- Prime ministers--Laos.
- Prince George County (Va.)--Social life and customs.
- Prince Georges County (Md.)--Social life and customs.
- Prince William County (Va.)--Social life and customs.
- Princes--Laos.
- Princeton, Battle of, Princeton, N.J., 1777.
- Printers--New York (State)--New York.
- Printers--United States.
- Printing.
- Printing blocks.
- Printing--Ohio--Dayton.
- Printing plates.
- Printing plates--1900-1970.
- Printing plates--1920-1970.
- Printing presses.
- Printing presses--Patents.
- Printing--Slavic countries.
- Printing--United States.
- Prints--Collectors and collecting.
- Prison industries.
- Prison reformers.
- Prison reformers--United States.
- Prison riots--New York (State)--Attica.
- Prisoners--California.
- Prisoners--Civil rights.
- Prisoners, foreign--Algeria.
- Prisoners--Legal status, laws, etc.
- Prisoners--Mental health services--Massachusetts.
- Prisoners of war.
- Prisoners of war--Delaware--Fort Delaware.
- Prisoners of war--Georgia--Andersonville.
- Prisoners of war--Maryland--Point Lookout.
- Prisons--California.
- Prisons--Japan.
- Prisons--Kentucky.
- Prisons--Law and legislation--United States.
- Prisons--United States.
- Privacy, Right of.
- Privacy, Right of--United States.
- Private investigators.
- Private libraries--United States.
- Private schools--Austria--Vienna.
- Private schools--New Hampshire--Exeter.
- Private schools--United States.
- Private schools--Washington (D.C.).
- Privateering.
- Privateering--Caribbean Sea.
- Privateering--History--18th century.
- Privateers.
- Procedure (Law)--Louisiana.
- Procedure (Law)--Missouri.
- Processions--New Jersey--Paterson.
- Product safety.
- Professional ethics.
- Professional ethics--United States.
- Professional sports.
- Program budgeting.
- Programming languages (Electronic computers).
- Programs.
- Programs (Documents).
- Progress.
- Progressive education.
- Progressivism (United States politics).
- Prohibition.
- Prohibition--United States.
- Projectiles, Aerial.
- Projective techniques.
- Promethium.
- Promoters.
- Promotional materials.
- Proofs--1920-1970.
- Propaganda, American.
- Propaganda, German.
- Propaganda, German--China.
- Propellers.
- Propellers, Aerial.
- Proposals.
- Prosecution.
- Prostitution.
- Prostitution--Japan.
- Protectionism--United States.
- Proteins.
- Protest movements--United States.
- Protest posters--1910-1940.
- Protest songs.
- Protest songs--United States--Texts.
- Protestant churches--Clergy--Correspondence.
- Protestant churches--Relations--Catholic Church.
- Protestantism.
- Providence (R.I.)--History.
- Provincias Unidas del RÃo de la Plata--History, Naval.
- Proximity fuzes.
- Prussia (Germany)--Foreign relations--United States.
- Prussia (Kingdom)--History.
- Psychiatric clinics--New York (State)--New York.
- Psychiatric hospitals--Pennsylvania--Danville.
- Psychiatric hospitals--Washington (D.C.).
- Psychiatrists.
- Psychiatry.
- Psychiatry--Practice--Germany--Berlin.
- Psychiatry--Practice--New York (State)--New York.
- Psychiatry--Study and teaching.
- Psychiatry--United States--Societies, etc.
- Psychic trauma.
- Psychoanalysis.
- Psychoanalysis and the arts.
- Psychoanalysis--Austria--Societies, etc.
- Psychoanalysis--Austria--Vienna.
- Psychoanalysis--California--Societies, etc.
- Psychoanalysis--Case studies.
- Psychoanalysis--Czech Republic--Prague.
- Psychoanalysis--Germany.
- Psychoanalysis--Illinois--Chicago--Societies, etc.
- Psychoanalysis--Maryland--Baltimore--Societies, etc.
- Psychoanalysis--Massachusetts--Boston--Societies, etc.
- Psychoanalysis--Middle West--Societies, etc.
- Psychoanalysis--New York (State)--New York--Societies, etc.
- Psychoanalysis--Norway--Oslo.
- Psychoanalysis--Pennsylvania--Philadelphia--Societies, etc.
- Psychoanalysis--Practice--New Jersey.
- Psychoanalysis--Practice--New York (State).
- Psychoanalysis--Societies, etc.
- Psychoanalysis--Standards.
- Psychoanalysis--Study and teaching.
- Psychoanalysis--Study and teaching--New York (State)--New York.
- Psychoanalysis--Study and teaching--United States.
- Psychoanalysis--Switzerland--Basel.
- Psychoanalysis--United States.
- Psychoanalysis--United States--Societies, etc.
- Psychoanalysis--Washington (D.C.)--Societies, etc.
- Psychoanalysts.
- Psychoanalysts--Biography.
- Psychoanalysts--Europe, Eastern.
- Psychoanalysts--Interviews.
- Psychoanalysts--Switzerland--Biography.
- Psychoanalysts--Training of.
- Psychological tests.
- Psychological tests for children.
- Psychological warfare.
- Psychologists.
- Psychologists--Licenses.
- Psychologists--Professional ethics.
- Psychology.
- Psychology and religion.
- Psychology, Pathological.
- Psychology--Periodicals.
- Psychology--Research.
- Psychology--Research--California--La Jolla.
- Psychology--Societies, etc.
- Psychology--Societies, etc.--New York (State).
- Psychology--Study and teaching.
- Psychology--Study and teaching--United States.
- Psychology--United States.
- Psychotherapist and patient.
- Psychotherapists.
- Psychotherapy.
- Public architecture.
- Public architecture--United States.
- Public buildings--Arkansas--Little Rock.
- Public buildings--Design and construction.
- Public buildings--Maryland--Baltimore.
- Public buildings--Minnesota--Saint Paul.
- Public buildings--New York (N.Y.).
- Public buildings--New York (State)--New York.
- Public buildings--United States.
- Public buildings--Virginia--Richmond.
- Public buildings--Washington (D.C.).
- Public buildings--West Virginia--Charleston.
- Public contracts--Corrupt practices--Alaska.
- Public health.
- Public health personnel.
- Public health--Philippines.
- Public health--Russia.
- Public health--Societies, etc.
- Public health--United States.
- Public housing.
- Public housing--Cuba.
- Public housing--Europe, Eastern.
- Public housing--United States.
- Public interest law--United States.
- Public interest--Societies, etc.
- Public interest--United States.
- Public lands.
- Public lands--New York (State).
- Public lands--United States.
- Public lands--United States--19th century.
- Public lands--West (U.S.).
- Public libraries.
- Public officials.
- Public officials--Haiti.
- Public officials--Louisiana.
- Public officials--Massachusetts.
- Public officials--Mississippi.
- Public officials--New Jersey.
- Public officials--New York (State).
- Public officials--New York (State)--New York.
- Public officials--Ohio.
- Public officials--Pennsylvania.
- Public officials--Philippines.
- Public officials--United States.
- Public opinion.
- Public opinion polls--United States.
- Public prosecutors--Massachusetts--Boston.
- Public prosecutors--Virginia--Richmond.
- Public records.
- Public relations.
- Public relations and politics.
- Public relations consultants.
- Public relations firms.
- Public relations firms--New York (State)--New York.
- Public relations--Periodicals.
- Public relations--Pharmaceutical industry.
- Public relations--United States.
- Public schools--New York (State).
- Public schools--New York (State)--New York.
- Public schools--Washington (D.C.).
- Public service employment.
- Public service employment--United States.
- Public speaking--1900-1920.
- Public universities and colleges.
- Public utilities.
- Public utilities--Law and legislation--New York (State).
- Public utilities--Law and legislation--United States.
- Public utilities--United States.
- Public welfare.
- Public welfare--Law and legislation--United States.
- Public welfare--Maryland.
- Public welfare--New York (State).
- Public welfare--United States.
- Public works--Tennessee River Valley.
- Public works--United States.
- Public works--United States--19th century.
- Public works--Washington (D.C.).
- Publications.
- Publicists.
- Publicity.
- Publicity photographs.
- Publishers.
- Publishers and publishing.
- Publishers and publishing--Correspondence.
- Publishers and publishing--Massachusetts--Boston.
- Publishers and publishing--New York (State)--New York.
- Publishers and publishing--Tennessee--Nashville.
- Publishers and publishing--United States.
- Publishers and publishing--Washington (D.C.).
- Pueblo Incident, 1968.
- Puerto Ricans--Education--United States.
- Puerto Ricans--Music.
- Puerto Ricans--Washington (D.C.)--Music.
- Puerto Rico.
- Puerto Rico--Commerce.
- Puerto Rico--Description and travel.
- Puerto Rico--Economic conditions.
- Puerto Rico--Foreign relations--Spain.
- Puerto Rico--Foreign relations--United States.
- Puerto Rico--History.
- Puerto Rico--History--1898-1952.
- Puerto Rico--History, Military.
- Puerto Rico--History--To 1898.
- Puerto Rico--Music.
- Puerto Rico--Politics and government.
- Puerto Rico--Politics and government--1898-1952.
- Puerto Rico--Politics and government--1952-1998.
- Puerto Rico--Politics and government--To 1898.
- Puerto Rico--Population.
- Puerto Rico--Religion.
- Puget Sound (Wash.)--Discovery and exploration.
- Pulitzer Prizes.
- Pullman porters--Labor unions--Canada.
- Pullman porters--Labor unions--United States.
- Pullman Strike, 1894.
- Purchasing power--Statistics.
- Pyrometers.