Yazar
John Fedkiw
9 cilt bulundu.
John Fedkiw · U.S. Dept. of Agriculture
35 sayfa · 1991
Water / Physiological effect / Agricultural pollution / Nitrates / Pollution
John Fedkiw · Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture
63 sayfa · 1964
Douglas fir / Forest productivity / Forest products industry / Douglas-fir
John Fedkiw · U.S. Dept. of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station
66 sayfa · 1989
Conservation of natural resources / History / Land use / National parks and reserves / Public lands
John Fedkiw · USDA Forest Service
284 sayfa · 1998
Forest management / Forests and forestry / Multiple use
John Fedkiw, Douglas W. Maccleery, V. Alaric Sample · Forest History Society
64 sayfa · 2004
Forests and forestry / History / Sustainable forestry / Forest management