1 Bartlett, Richard A. Yellowstone: A Wilderness Besieged. Tucson, AZ: University of Arizona Press, 1985.
2 Biddulph, Stephen G. Five Old Men of Yellowstone: The Rise of Interpretation in the First National Park. Salt Lake City, UT: University of Utah Press, 2013.
3 Haines, Aubrey L. The Yellowstone Story: A History of Our First National Park, Vol. 1. Boulder, CO: University of Colorado Press, 1996.
4 Haines, Aubrey L. Yellowstone: Its Exploration and Establishment. Washington, D.C.: U.S. Department of the Interior, 1974.
5 Miller, M. Mark. Adventures in Yellowstone: Early Travelers Tell Their Tales. Guilford, CT: Two Dot Press, 2009.
6 Schullery, Paul. Searching for Yellowstone: Ecology and Wonder in the Last Wilderness. New York, NY: Houghton Mifflin, 1997.
7 ----. The Yellowstone Story: A History of Our First National Park, Vol. 2. Boulder, CO: University of Colorado Press, 1996.
8 Timblin, Stephen. The Rough Guide to Yellowstone & Grand Teton. New York, NY: Rough Guides, 1997.
9 “Yellowstone Fact Sheet.” National Park Service. 2014, Accessed February 10, 2014.
10 Yellowstone National Park Issues and Resources Handbook 2013. National Park Service. Accessed February 11, 2014.