By Willits Susan   in Western Journal of Applied Forestry

ISSN:0885-6095|9|1|8-13

Society of American Foresters‎(1994)‎

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By Lowell Eini C.   Willits Susan A.   in Western Journal of Applied Forestry

ISSN:0885-6095|13|2|54-59

Society of American Foresters‎(1998)‎

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