Хайлтын үр дүнгүүд - Hays, Samuel P.

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  1. 1

    Wars in the woods : the rise of ecological forestry in America / Hays, Samuel P.

    Хэвлэсэн 2007
    An electronic book accessible through the World Wide Web; click to view
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  2. 2

    The American people & the national forests : the first century of the U.S. Forest Service / Hays, Samuel P.

    Хэвлэсэн 2009
    An electronic book accessible through the World Wide Web; click to view
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  3. 3

    Conservation and the gospel of efficiency : the progressive conservation movement, 1890-1920 / Hays, Samuel P.

    Хэвлэсэн 1999
    An electronic book accessible through the World Wide Web; click to view
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