Term Definition
Soule 1976

Soule, James M. 1976. Geologic Hazards in the Crested Butte–Gunnison Area, Gunnison County, Colorado. Denver: Colorado Geological Survey.

Spirn 1998

Spirn, Anne Whiston. 1998. The Language of Landscape. New Haven, CT: Yale University Press.

Stegner 1992

Stegner, Wallace. 1992. Beyond the Hundredth Meridian: John Wesley Powell and the Second Opening of the West. New York: Penguin Books.