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Ask a Librarian: an online reference service from the Library of Congress
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
Many questions can be answered using for Science and Technology
 Library of Congress Online Catalog
 Library of Congress Virtual Reference Shelf
 Virtual Reference Desk AskA+ Locator

Visit the
Science Reading Room Web page
We suggest that you
 Consult your local library first
 Read our reference correspondence policy
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Getting answers

Ask a Librarian NowAsk a Librarian:
If you have a reference question, proceed to the online form; get answers via email.

Contact us by phone or fax:
  Phone: (202) 707-5639, 707-1205
  Fax: (202) 707-1925

Send us written correspondence*:
  Science, Technology and Business Division
  Library of Congress
  101 Independence Ave. SE
  Washington, D.C. 20540-4750

* please read - information on mail delays

Visit our Web Pages:
 Science Reference Services
 Technical Reports and Standards
 Selected Internet Resources in Science
 Science Tracer Bullet Series
 Science Reference Guides
 Business Reference Services

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


  The Library of Congress >> Ask a Librarian Home
  June 8, 2007