Help in all areas of subject access is available through these tools. Published in various formats, the major subject headings authority tools listed here include the six-volume Library of Congress Subject headings, the web-based subscription service, Classification Web, and Subject Headings Manual. Many, but not all, of these publications are also available in the web-based subscription service, Cataloger's Desktop.
- Free-Floating Subdivisions: An Alphabetical Index. 23rd edition (2011)
- LC Period Subdivisions Under Names of Places. 5th edition
- LC Subject Headings Weekly Lists
- Library of Congress Subject Headings. 34th edition (2012)
- Library of Congress Subject Headings. 33rd edition (2011)
- Library of Congress Subject Headings Supplemental Vocabularies: Free-Floating Subdivisions, Genre/Form Headings, Children's Subject Headings (2009)
- SACO Participants' Manual
- Subject Headings Manual
