By Powers H. R.   Kraus J. F.   in Southern Journal of Applied Forestry

ISSN:0148-4419|10|4|230-232

Society of American Foresters‎(1986)‎

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By Johansen R. W.   Kraus J. F.   in Journal of Forestry

ISSN:0022-1201|56|9|664-664

Society of American Foresters‎(1958)‎

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