Mathew Brady's Portraits: Images as History, Photography as Art
http://www.npg.si.edu/exh/brady/index.htm

Mathew Brady (Library of Congress)
http://memory.loc.gov/ammem/cwphtml/cwbrady.html

Gardner, Alexander. Gardner's Photographic Sketchbook of the War. 2 vols. 1866. Reprint, New York: Dover Publications, 1959.

Panzer, Mary. Mathew Brady and the Image of History. Washington, D.C.: Smithsonian Institution, 1997.

Sullivan, George. Mathew Brady: His Life and Photographs. New York: Cobblehill Books, 1994.

Trachtenberg, Alan. Reading American Photographs: Images as History, Mathew Brady to Walker Evans. New York: Hill and Wang, 1989.