By Baer Norman W.   in Journal of Forestry

ISSN:0022-1201|87|4|32-36

Society of American Foresters‎(1989)‎

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By Schaefer Peter R.   Baer Norman W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|2|4|105-107

Society of American Foresters‎(1985)‎

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By Schaefer Peter R.   Baer Norman W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|9|3|102-107

Society of American Foresters‎(1992)‎

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