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NRC Research Press‎(2006)‎

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By Singh Gurbir   Williard Karl W. J.   Schoonover Jon E.   in Agronomy

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MDPI‎(2016)‎

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By Singh Gurbir   Schoonover Jon E.   Monroe Kyle S.   Williard Karl W. J.   Ruffner Charles M.   in Forests

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MDPI‎(2017)‎

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By Carver Andrew D.   Danskin Scott D.   Zaczek James J.   Mangun Jean C.   Williard Karl W. J.   in Northern Journal of Applied Forestry

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Society of American Foresters‎(2004)‎

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By Edwards Pamela J.   Williard Karl W.J.   in Journal of Forestry

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Society of American Foresters‎(2010)‎

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