By Simpson J. Dale   in Journal of Forestry

ISSN:0022-1201|95|3|12-14

Society of American Foresters‎(1997)‎

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By Carter Katherine K.   Simpson J. Dale   in Northern Journal of Applied Forestry

ISSN:0742-6348|2|4|127-131

Society of American Foresters‎(1985)‎

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By Bujold Stephanie J.   Simpson J. Dale   Beukeveld John H. J.   Schneider Marc H.   in Northern Journal of Applied Forestry

ISSN:0742-6348|13|3|124-128

Society of American Foresters‎(1996)‎

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