The easiest way to access to library catalogues.
To suggest libraries write to borgolibrario@studiocondo.it

WASHINGTON D.C. (USA)

The Library of Congress, Washington, DC, District of Columbia, USA
http://www.loc.gov

American University Washington, DC, District of Columbia, USA
http://www.library.american.edu/

Catholic University of America Washington, DC,
District of Columbia, USA
http://libraries.cua.edu/welcome.html

Gallaudet University Washington, DC, District of Columbia, USA
http://library.gallaudet.edu/

George Washington University Washington, DC, District of Columbia, USA
http://www.gwu.edu/libraries.cfm

Georgetown University Washington, DC, District of Columbia, USA
http://gulib.lausun.georgetown.edu/

Howard University Washington, DC, District of Columbia, USA http://www.howard.edu/library/

University of the District of Columbia Washington, DC, District of Columbia, USA
http://www.wrlc.org/~lrdudc/