By Dwinell L. David   in Journal of Forestry

ISSN:0022-1201|76|2|80-83

Society of American Foresters‎(1978)‎

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By Fraedrich Stephen W.   Dwinell L. David   in Southern Journal of Applied Forestry

ISSN:0148-4419|29|3|117-122

Society of American Foresters‎(2005)‎

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