American Bar Association: http://www.abanet.org/

Illinois State Bar Association: http://www.illinoisbar.org/

Chicago Bar Association: http://www.chicagobar.org/

American Association of Law Libraries (AALL): http://www.aallnet.org/index.asp

American Library Association: http://www.ala.org/

Association of Research Libraries: http://www.arl.org/

Illinois Library Association: http://www.ila.org/index.shtml

Medical Library Association: http://www.mlanet.org/index.html

Special Libraries Association: http://www.sla.org/

AALL Chapters (via AALL website):
http://www.aallnet.org/chapter/chapters.asp

Illinois State Library: http://www.cyberdriveillinois.com/departments/library/

Institute of Museum and Library Services: http://www.imls.gov/index.shtm

Library of Congress: http://www.loc.gov/