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  1. 1
    by Twight, Peter A.
    Published 1973
    Subjects “...Forest conservation Northwest, Pacific....”
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    Ecological forestry for the Douglas Fir region.
  2. 2
    by King, James E.
    Published 1966
    Subjects “...Forest site quality Northwest, Pacific....”
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    Site index curves for Douglas-fir in the Pacific Northwest /

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