By Johnson Walter N.   Brown Patrick W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|7|3|114-117

Society of American Foresters‎(1990)‎

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By Lavin Shana R   Van Deelen Timothy R   Brown Patrick W   Warner Richard E   Ambrose Stanley H   in Canadian Journal of Zoology

ISSN:1480-3283|81|6|1070-1082

NRC Research Press‎(2003)‎

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