By Welch D. S.   in Journal of Forestry

ISSN:0022-1201|32|9|997-1002

Society of American Foresters‎(1934)‎

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By Stone E. L.   Morrow R. R.   Welch D. S.   in Journal of Forestry

ISSN:0022-1201|52|2|104-114

Society of American Foresters‎(1954)‎

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