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Authors whose works are in public domain in at least one jurisdiction

List of works by James Martin Trappe

Growth of Douglas-fir, ponderosa pine, and western larch seedlings following seed treatment with 30 percent hydrogen peroxide ⬇️

[Portland, Or.] :Pacific Northwest Forest and Range Experiment Station, U.S.D.A. Forest Service,[1970] | U.S. Department of Agricul

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