By Einspahr Dean W.   Wyckoff Gary W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|7|4|168-171

Society of American Foresters‎(1990)‎

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By Li Bailian   Wyckoff Gary W.   Einspahr Dean W.   in Northern Journal of Applied Forestry

ISSN:0742-6348|10|3|117-122

Society of American Foresters‎(1993)‎

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By Einspahr Dean W.   Wyckoff Gary W.   Fiscus Marianne (Harder)   in Journal of Forestry

ISSN:0022-1201|82|2|104-106

Society of American Foresters‎(1984)‎

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