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by Auchmoody, L. R.
Upper Darby, PA : United States Department of Agriculture, 1972.

Series: Research paper (Northeastern Forest Experiment Station) ; NE-239

Newtown Square, PA : United States Department of Agriculture, Forest Service, Northern Research Station, July 2014.

Series: General technical report (Northern Research Station) ; NRS-135

by Sander, Ivan L
[St. Paul] : Dept. of Agriculture, Forest Service, North Central Forest Experiment Station, Forest Service, 1977.

by Auchmoody, L. R
Upper Darby, Pa. : Forest Service, U.S. Dept. of Agriculture, Northeastern Forest Experiment Station, 1975.

Series: Research paper (Northeastern Forest Experiment Station) ; NE-331

Upper Darby, Pa. : Northeastern Forest Experiment Station, Forset service, U.S. Department of Agriculture, 1971.