Estados Unidos

ALCATRAZ HISTORY
Designed to help introduce you to the rich history of Alcatraz during the penitentiary years from the mid 1930's until the mid 1960's.

AMERICAN HISTORY COMPANY
Information on historic texts, the toughest American History quiz on the Internet, America's Freedom Documents, and encyclopedic links, organized by time period and topic. 

ATLAS OF THE HISTORICAL GEOGRAPHY OF THE U.S.
Proyecto de University of Richmond-Virginia, donde se integra los últimos recursos tecnológicos del siglo XXI, con las recreaciones históricas de mapas temáticos realizados por Charles O. Paullin y John K. Wright (publicado originalmente en 1932).

HISTORYNET.COM
Contains daily features, photo galleries and over 5,000 articles originally published in Weider History Group various magazines.

NATIONAL ARCHIVES
An independent agency of the United States government charged with preserving and documenting government and historical records and with increasing public access to those documents, which comprise the National Archives.

NATIONAL ENDOWMENT FOR THE HUMANITIES
An independent grant-making agency of the United States government dedicated to supporting research, education, preservation, and public programs in the humanities.

U.S. LIBRARY OF CONGRESS
The Library's mission is to support the Congress in fulfilling its constitutional duties and to further the progress of knowledge and creativity for the benefit of the American people.

U.S. NATIONAL ARCHIVES AND RECORD ADMINISTRATION
Preserving and providing access to the records of the United States of America.