By Knudson Douglas M.   Larson Geri B.   in Journal of Forestry

ISSN:0022-1201|80|9|579-602

Society of American Foresters‎(1982)‎

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By Knudson Douglas M.   Collom James L.   in Journal of Forestry

ISSN:0022-1201|67|9|646-650

Society of American Foresters‎(1969)‎

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By Knudson Douglas M.   Curry Elizabeth B.   in Journal of Forestry

ISSN:0022-1201|79|2|92-94

Society of American Foresters‎(1981)‎

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