Allen, Eugene T. and Day, Arthur L. Hot Springs of the Yellowstone National Park. Washington, D.C.: Carnegie Institution, 1935.
Alter, J. Cecil. James Bridger, Trapper, Frontiersman, Scout and Guide. Salt Lake City: Shepard Book Co., 1925.
Arnold, Ross R. Indian Wars in Idaho. Caldwell, Idaho: Caxton Printers, 1929.
Bennett, Hugh H. “Thomas Jefferson Soil Conservationist.” U.S. Department of Agriculture, No. 548. Washington, D.C.: Government Printing Office, 1944.
Catlin, George. North American Indians, I, II. Philadelphia: Leary Stuart and Co., 1913.
Crampton, Louis C. Early History of Yellowstone National Park and Its Relations to National Park Policies. Washington, D.C.: United States Printing Office, 1923.
DeSmet, P. J. Oregon Missions and Travels Over the Rocky Mountains. New York: Edward Dreneger, 1847.
De Voto, Bernard. Across the Wide Missouri. Boston: Houghton Mifflin Co., 1947.
Drew, Benjamin. Souvenir List of Yellowstone Park Holdup Victims. Park Library, Mammoth, Wyoming.
Fee, Chester Anders. Chief Joseph, the Biography of a Great Indian. New York: Wilson-Erickson, 1936.