By Yang Jeng C.   Lee Chen H.   in Journal of Forestry

ISSN:0022-1201|91|6|40-42

Society of American Foresters‎(1993)‎

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By Lee Chen H.   Schabel Hans G.   in Northern Journal of Applied Forestry

ISSN:0742-6348|6|1|31-33

Society of American Foresters‎(1989)‎

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