By Willhite Robert G.   in Journal of Forestry

ISSN:0022-1201|73|7|418-434

Society of American Foresters‎(1975)‎

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By Willhite Robert G.   Sise William R.   in Journal of Forestry

ISSN:0022-1201|72|9|567-571

Society of American Foresters‎(1974)‎

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