Primary Sources
American Memory, The Library of Congress
Chronicling America Historic American Newspapers
Digital History (University of Houston)
Edison Motion Pictures (American Memory)
Statue of Liberty / Ellis Island Foundation
Historic American Maps (University of Georgia Libraries)
Historical Maps of the United States (University of Texas)
Historic Photo Archives (LIFE Magazine)
Many Pasts from History Matters
New York Public Library Digital Gallery
U.S. Historical Documents (University of Oklahoma)