By Shaffer Robert M.   Klemperer W. David   Meyer Richard D.   in Southern Journal of Applied Forestry

ISSN:0148-4419|9|4|250-253

Society of American Foresters‎(1985)‎

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By Meyer Richard D.   Klemperer W. David   Siegel William C.   in Journal of Forestry

ISSN:0022-1201|84|12|35-38

Society of American Foresters‎(1986)‎

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