Sources used to create this Guide:

1. Ritzenthaler, Mary Lynn., and Vogt-O'Connor, Diane. Photographs : Archival Care and Management. Society of American Archivists, 2006.

2. Newhall, Beaumont. The History of Photography. Rev. and enl. ed., 4th ed., Museum of Modern Art in Collaboration with the George Eastman House, Rochester, New York ; Distributed by New York Graphic Society, 1964.

Additional sources available in the Library, or via inter-library loan:

• Books and articles on daguerreotypes

• Books and articles on ambrotypes

• Books and articles on cyanotypes

• Books and articles on tintypes

• Books and articles on card photographs: cartes de visite, cabinet

• Books and articles on stereoscopic photography / stereographs

• Books and articles on black and white photography

• Books and articles on autochromes

• Books and articles on lantern slides

• Books on the history of photography

• Books on early color photography

• Books and articles on how to "read" photographs

• Books and articles on artistic photography

• Books and articles on documentary / historical photography

The Library of Congress's Prints and Photographs Division has digitized an impressive array of image formats / types and subjects. Those digital materials, grouped by collection, can be found here. Similarly, the holdings of the National Archives and Records Administration include 3 million digital photographs and graphic images in the Still Picture collections at the National Archives at College Park; those digitized materials can be found by scrolling to the bottom of the page (Photographs and Graphic Works in College Park, Maryland).