By Zehngraff Paul J.   in Journal of Forestry

ISSN:0022-1201|47|7|555-565

Society of American Foresters‎(1949)‎

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By Zehngraff Paul J.   in Journal of Forestry

ISSN:0022-1201|41|2|122-125

Society of American Foresters‎(1943)‎

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By Zehngraff Paul J.   in Journal of Forestry

ISSN:0022-1201|48|10|681-684

Society of American Foresters‎(1950)‎

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By Gevorkiantz S. R.   Rudolf Paul O.   Zehngraff Paul J.   in Journal of Forestry

ISSN:0022-1201|41|4|268-274

Society of American Foresters‎(1943)‎

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