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  1. 1
    Published 1986
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    Douglas-fir : stand management for the future /
  2. 2
    by Heilman, Paul E., 1931-
    Published 1981
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    Forest soils of the Douglas-fir region /
  3. 3
    Published 1984
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    Silvicultural management strategies for pests of the interior Douglas-fir and Grand fir forest types : proceedings of a symposium held, February 14-16, 1984, Spokane, Washington /

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