By Thill Ronald E.   in Canadian Journal of Forest Research

ISSN:1208-6037|43|7|619-626

NRC Research Press‎(2013)‎

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By Perry Roger W.   Thill Ronald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|23|3|164-169

Society of American Foresters‎(1999)‎

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By Grelen Harold E.   Pearson Henry A.   Thill Ronald E.   in Southern Journal of Applied Forestry

ISSN:0148-4419|9|4|232-236

Society of American Foresters‎(1985)‎

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