By Johnston Jerry J.   Weigel Dale R.   Randolph J. C.   in Journal of Forestry

ISSN:0022-1201|95|6|16-20

Society of American Foresters‎(1997)‎

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By Ehman J.L.   Fan W.   Randolph J.C.   Southworth J.   Welch N.T.   in Forest Ecology and Management

ISSN:0378-1127|155|1|237-255

Elsevier‎(2002)‎

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