Use article databases to find sources like these:
Arave, Joseph. "The Forest Service Takes to the Slopes: The Birth of Utah's Ski Industry and the Role of the Forest Service." Utah Historical Quarterly 70, no. 4 (2002): 341-355.
Arrington, Leonard J. "Abundance from the earth: The beginnings of commercial mining in Utah." Utah Historical Quarterly 31, no. 3 (1963): 192-219.
Jackson, W. Turrentine. "The Infamous Emma Mine: A British Interest in the Little Cottonwood District, Utah Territory." Utah Historical Quarterly 23, no. 4 (1955): 339-362.
Jenkins, Michael J., and Elizabeth G. Hebertson. "Using vegetative analysis to determine the extent and frequency of avalanches in Little Cottonwood Canyon, Utah." In Proceedings of the International Snow Science Workshop, Snowbird, Utah, pp. 91-103. 1994.
Madsen, David B., and Donald R. Currey. "Late Quaternary glacial and vegetation changes, Little Cottonwood Canyon area, Wasatch Mountains, Utah." Quaternary Research 12, no. 2 (1979): 254-270.
Richmond, Gerald Martin. Glaciation of Little Cottonwood and Bells Canyons, Wasatch Mountains, Utah. USGS Professional Paper 454-D, US Government Printing Office (1964).
etc...
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