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donald a duff
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Conservation assessment for inland cutthroat trout
Donald A. Duff · USDA Forest Service, Intermountain Region
120 sayfa · 1996
Conservation / Cutthroat trout / Fishery conservation
Fisheries and aquatic habitat inventory and analysis techniques
Paul Cuplin, Carl L. Armour, Raymond V. Corning, Donald A. Duff, Arthur L. Oakley · U.S. Department of the Interior, Bureau of Land Management
28 sayfa · 1974
Aquatic sciences / Methodology / Habitat (Ecology) / Aquatic animals / Habitat
Techniques for conducting stream habitat surveys on national resource land
Donald A. Duff · U.S. Dept. of the Interior, Bureau of Land Management
73 sayfa · 1978
Fishing surveys / Fish habitat improvement / Stream conservation
Indexed bibliography on stream habitat improvement
Donald A. Duff · U.S. Dept. of Agriculture, Forest Service, Intermountain Region
143 sayfa · 1982
Stream conservation / Fish habitat improvement / Freshwater fishes