Library of Congress Federal Research Division (1999).

Library of Congress Federal Research Division (June 1988).

Library of Congress Federal Research Division (2010).

Library of Congress Federal Research Division (November 1994).

Carnegie's personal papers reside at the Library of Congress Manuscript Division.

Library of Congress Federal Research Division (September 1991).

Library of Congress Federal Research Division (December 1987).

Library of Congress Federal Research Division (January 1992).

Library of Congress Federal Research Division (May 1, 2006).

Library of Congress Federal Research Division (March 1996).