Shepperd, Wayne D.
Fort Collins, Colo. (240 W. Prospect Rd., Fort Collins 80526) : U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, [1993]
1993
Shepperd, Wayne D.
Fort Collins, Colo. (240 W. Prospect Rd., Fort Collins 80526) : U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station, [1996]
1996