Rocky Mountain Forest and Range Experiment Station, Fort Collins, Colo.
USDA Forest Service Research Paper RM-166
Severson, Kieth E.; Thilenius, John F. 1976. Classification of Quaking Aspen Stands in the Black Hills and Bear Lodge Mountains. U.S. Department of Agriculture, USDA Forest Service, Rocky Mountain Forest and Range Experiment Station Forest Service, Research Paper RM-166. 24p.