Porterfield, Richard L.

Impacts of the changing quality of timber resources : proceedings of a joint meeting of the ... - Madison, Wis. : Forest Products Research Society, (1979) - 49 p. : ilus. ; mapas ; gráfs. - Proceedings ; P-78-21 . - Proceedings ; P-78-21 .

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Bosques--E.U.A.
Industrias forestales--E.U.A.
Recursos forestales--E.U.A.