By Campbell Gene E.   Countryman David W.   in Journal of Forestry

ISSN:0022-1201|79|9|605-607

Society of American Foresters‎(1981)‎

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By Countryman David W.   Miller Helene R.   in Northern Journal of Applied Forestry

ISSN:0742-6348|6|4|165-169

Society of American Foresters‎(1989)‎

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By Countryman David W.   Thomson George W.   in Journal of Forestry

ISSN:0022-1201|77|6|361-361

Society of American Foresters‎(1979)‎

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By Bardon Robert E.   Countryman David W.   Hall Richard B.   in Northern Journal of Applied Forestry

ISSN:0742-6348|16|2|103-107

Society of American Foresters‎(1999)‎

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By Jones J. Greg   Beardsley Wendell G.   Countryman David W.   Schweitzer Dennis L.   in Forest Science

ISSN:0015-749X|24|3|410-422

Society of American Foresters‎(1978)‎

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By Hall Andrew B.   Keller Leslie L.   Varner Louis   Naing Win   Countryman David   Mitchell James D.   in The American Surgeon

ISSN:1555-9823|77|1|128-131

Southeastern Surgical Congress‎(2011)‎

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