By Perkey Arlyn W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|2|4|99-99

Society of American Foresters‎(1985)‎

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By Perkey Arlyn W.   Carvell Kenneth L.   in Northern Journal of Applied Forestry

ISSN:0742-6348|5|3|221-222

Society of American Foresters‎(1988)‎

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By Perkey Arlyn W.   Wilkins Brenda L.   in Northern Journal of Applied Forestry

ISSN:0742-6348|6|2|85-86

Society of American Foresters‎(1989)‎

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