Author
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Pennsylvania State University. Cooperative Extension Service
1
Rizzo, David
1
Shigo, Alex L., 1930-
1
Shriner, David S.
1
Smith, C. T.
1
Solomon, Dale S
1
Stout, Susan L.
1
Symposium on Forest Fertilization in an Environmental Setting in the Northeastern United States and Eastern Canada Pack Demonstration Forest)
1
Symposium on the Conflicting Consequences of Practicing Northern Hardwood Silviculture Durham, New Hampshire)
1
Symposium: Microbial Control of Spruce Budworms and Gypsy Moths Windsor Locks, Conn.)
1
US/FRG Research Symposium: Effects of Atmospheric Pollutants on the Spruce-Fir Forests of the Eastern United States and the Federal Republic of Germany Burlington, Vt.)
1
United States Department of Agriculture
1
United States Department of Agriculture Forest Service
1
United States Department of Agriculture. Forest Service
1
University of New Hampshire
1
Walters, Russell S
1