By Gray James R.   Fowler John M.   Bray Mary A.   in Journal of Forestry

ISSN:0022-1201|80|1|23-26

Society of American Foresters‎(1982)‎

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By Lillywhite Jay M.   Simonsen Jennifer E.   Fowler John M.   in Western Journal of Applied Forestry

ISSN:0885-6095|28|2|78-84

Society of American Foresters‎(2013)‎

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