By Colwell Robert N.   in Journal of Forestry

ISSN:0022-1201|50|4|271-276

Society of American Foresters‎(1952)‎

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By Colwell Robert N.   Harris Thomas H.   Arnold Keith   Wear J. F.   Bongberg J. W.   in Journal of Forestry

ISSN:0022-1201|49|9|630-633

Society of American Foresters‎(1951)‎

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