By Van Den Driessche R.   Webber J. E.   in Forest Science

ISSN:0015-749X|23|2|134-142

Society of American Foresters‎(1977)‎

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By Stoehr M U   Webber J E   Hollefreund C C.   Painter R A   in Canadian Journal of Forest Research

ISSN:1208-6037|34|4|981-984

NRC Research Press‎(2004)‎

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