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  1. 1
    由 Heilman, Paul E., 1931-
    出版 1981
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    Forest soils of the Douglas-fir region /
  2. 2
    出版 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 /
  3. 3
    出版 1976
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    Tree planting in the inland northwest : shortcourse proceedings held at Washington State University, Pullman, 17-19 February, 1976 /

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