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DNR Office
Author
12
Northeastern Forest Experiment Station (Radnor, Pa.)
9
United States. Forest Service
4
Garrett, Peter W., 1933-
4
Leak, William B.
3
Northeastern Forest Experiment Station
3
U.S. Department of Agriculture. Forest Service
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3
United States Department of Agriculture
3
United States Department of Agriculture. Forest Service
2
Birch, Thomas W.
2
Donnelly, John R
2
Federer, C. Anthony
2
Gansner, David A.
2
Schreiner, Ernst J. 1902-
2
Wilkinson, Ronald C.
1
Arner, Stanford L.
1
Auchmoody, L. R
1
Auchmoody, L. R.
1
Beaton, John A.
1
Bjorkbom, John C., 1915-
1
Briggs, R. D.
1
Brisbin, Robert L.
1
Carl, Clayton M
1
Cullen, J. B.
1
Czapowskyj, M. M.
1
DeBald, Paul S.
1
Dudzik, Kenneth R.
1
Filip, Stanley M.
1
Frieswyk, T. S.
1
Graber, Raymond E
1
Halverson, Howard G.
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Subject
12
Trees
11
Forests and forestry
10
Growth
9
Hardwoods
7
Forest management
6
Measurement
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6
Sugar maple
6
White pine
5
Diseases and pests
5
Research
3
Clearcutting
3
Defects
3
Forest site quality
3
Forest soils
3
Forest surveys
3
Mathematical models
3
Timber
3
Wood
3
Wounds and injuries
2
Clearing of land
2
Forest regeneration
2
Grading
2
Logging
2
Oak
2
Pine
2
Reforestation
2
Regeneration
2
Spacing
2
White pine weevil
1
Acid rain
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Place
Collection
Year of Publication