By Ginsburg E.O.   Cowling E.B.   in Environment International

ISSN:0160-4120|29|2|125-135

Elsevier‎(2003)‎

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By Froelich R. C.   Cowling E. B.   Collicott L. V.   Dell T. R.   in Forest Science

ISSN:0015-749X|23|3|299-306

Society of American Foresters‎(1977)‎

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