1. Albright, H. M. 1985. The birth of the National Park Service: the founding years, 1913–1933. Howe Brothers, Salt Lake City, Utah.
2. Working paper;T. L. Anderson,1988
3. Baden, J. 1988. Let nature groups bid for control.The Wall Street Journal, November 23:A14.
4. Baden, J., and R. L. Stroup (eds.). 1981. Bureaucracy versus the environment—the environmental costs of bureaucratic government. University of Michigan Press, Ann Arbor, Michigan.
5. Barbee, R. and P. Schullery. 1989. Yellowstone: the smoke clears.National Parks 63(3/4):18–19.