Advertising collections at Duke University:
Library of Congress Prints and Photographs Catalog
The collections include photographs, fine and popular prints and drawings, posters, and architectural and engineering drawings. While international in scope, the collections are particularly rich in materials produced in, or documenting the history of, the United States and the lives, interests and achievements of the American people.
American Memory from the Library of Congress
Provides access through to written and spoken words, sound recordings, still and moving images, prints, maps, and sheet music that document the American experience. It is a digital record of American history and creativity.
Shorpy Historical Photo Archive
Shorpy.com is a vintage photography blog. Most of the photographs presented on the website date to the early twentieth century.
Life Magazine via Google Digitized issues back to 1935