How to save Dutch elm diseased trees by pruning /
J. R. Allison, G. F. Gregory.
APA Citation
Allison, J. R., Gregory, G. F., United States. Forest Service. Northeastern Area, S. and Private Forestry. (1979). How to save Dutch elm diseased trees by pruning. [Broomall, Pa.]: Dept. of Agriculture, Forest Service, Northeastern Area, State and Private Forestry.
MLA Citation
Allison, James R, G. F Gregory, and State and Private Forestry United States. Forest Service. Northeastern Area. How to Save Dutch Elm Diseased Trees by Pruning. [Broomall, Pa.]: Dept. of Agriculture, Forest Service, Northeastern Area, State and Private Forestry, 1979.
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