by United States. Forest Service.
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Atlas of United States trees
The national forest manual
Environmental assessment
Forest Service research & development
The Forest Service program for forest an...
Late-successional reserve assessment for...
Douglas-fir tussock moth handbook
Bioassay of acephate-treated foliage on ...
1974 cooperative Douglas-fir tussock mot...
Decay in white fir top-killed by Douglas...