|| Before You Ask ||
Services We Provide
- Basic research assistance related to science, technology, and engineering
- Answers to queries requiring resources unique to the Library of Congress
- Resources for teachers and science fair participants
- Information on technical reports and standards
- Response within 5 business days
Services We Cannot Provide
- Answers for student assignments
- Answers for contests, puzzles or games
- Copies of scientific books and periodicals
You can also visit the Science Reference Services Web site or read through our Frequently Asked Questions.
Ask a Librarian Online
For reference questions, proceed to the online form and get answers via email.
Contact us by Phone or Fax
(202) 707-5639
(202) 707-1205
Fax:(202) 707-1925
Written Correspondence *
Science, Technology &
Business Division Business
Reference Services
Library of Congress
Washington, D.C. 20540-4754
* Please note: information on mail delays
|| Additional Science/Technology Resources ||
We suggest that you:
- Consult your local library first
- Read our reference correspondence policy
Many questions can be answered using:
- USA.gov for Science and Technology
- Library of Congress Online Catalog
- Library of Congress Virtual Reference Shelf
- Virtual Reference Desk AskA+ Locator
Certain types of questions are better directed elsewhere. Your local library can direct you with books, special online indexes, full text products, pamphlets, and other useful resources:
- Resources for school assignments in the US
- Photoduplication services
- Interlibrary loan
- American Memory for digitized resources in the Library's collections
- Frequently Asked Questions about the Library
Visit our Web Pages:
