USDA Forest Service General technical report WO
Forest Service, U.S. Department of Agriculture
U.S. Dept. of Agriculture, Forest Service [1981] USDA Forest Service General technical report WO 26
Available at 1 libraries
U.S. Department of Agriculture Forest Service
Department of Agriculture Forest Service [1979] USDA Forest Service General technical report WO 12
pbk.
Forest Service, U.S. Dept. of Agriculture, 1978 USDA Forest Service General technical report WO 5
Dixie R. Smith, technical coordinator
Forest Service, U.S. Dept. of Agriculture 1975 USDA Forest Service General technical report WO 1