A primary source is an original work by a participant or witness to any particular event or place in time. Diaries, interviews, letters, original works of art, and speeches are all examples of primary sources.
American History Online
Original Sources
JSTOR
History Reference Center
Defining Documents in American History: World War I (1914–1919)
U.S. History In Context
American History, 1493-1945
African American Studies Center
ImageQuest
Digital Public Library of America
American History Collections
The National Archives
The Avalon Project Documents
Digital Collections
The New York Times Archive
Newspapers.com [only on campus]
Ancestry.com [only on campus]
Fold3 Military Records [only on campus]