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By Frank Robert M.   in Revue d'Orthopédie Dento faciale

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Edp Sciences‎(2010)‎

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By Frank Robert M.   Safford Lawrence O.   in Journal of Forestry

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Society of American Foresters‎(1970)‎

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By Sendak Paul E   Brissette John C   Frank Robert M   in Canadian Journal of Forest Research

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NRC Research Press‎(2003)‎

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