Author
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U.S. Dept. of Agriculture. Forest Service
1
Underwood, G. R.
1
United States. Dept. of Agriculture
1
United States. Forest Insect and Disease Management
1
University of New Brunswick
1
University of New Brunswick. School of Forestry
1
VanSickle, G. A.
1
Varty, I. W
1
Washburn & Gillis Associates, Ltd
1
Yates, Harry O.
1