New York Times
New York Times: An in Depth History of Group F.64
This article is based on a book by Mary Street Alinder, who had worked with Anselm Adams. Group f.64 was a group of photographers in the 1930s who advocated for a pure style of photography.
Smithsonian Institution
Smithsonian American Art Museum: Imogen Cunningham
As part of the Smithsonian Art Museum's database of artists, this site provides biographical information on Imogen Cunningham in addition to an extensive listing of his works as displayed at the museum.
Smithsonian Institution
National Portrait Gallery: Portrait of the Art World: Imogen Cunningham
Brief essay about the artistic interests of American photographer Imogen Cunningham.