By Joseph Joshua A.   Butler William H.   Via Charles E.   in Proceedings of the Water Environment Federation

ISSN:1938-6478|2006|5|6468-6492

Water Environment Federation‎(2006)‎

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By Goldstein Bruce E.   Butler William H.   Hull R. Bruce   in Journal of Forestry

ISSN:0022-1201|108|3|120-125

Society of American Foresters‎(2010)‎

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