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

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A history of environmental politics since 1945 / von Hays, Samuel P.

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The American people and the National forests the first century of the U.S. Forest Service von Hays, Samuel P.

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The American People and the National Forests The First Century of the U.S. Forest Service von Hays, Samuel P.

Conservation and the gospel of efficiency the Progressive conservation movement; 1890 - 1920 von Hays, Samuel P.

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Explorations in environmental history essays von Hays, Samuel P.

The response to industrialism 1885 - 1914 von Hays, Samuel P.

Beauty, health, and permanence environmental politics in the United States, 1955 - 1985 von Hays, Samuel P.

The structure of environmental politics since World War II von Hays, Samuel P.

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Conservation and the gospel of efficiency The progressive conservation movement, 1890-1920. With a new pref. by the author von Hays, Samuel P.

The chemicals and allied industries von Hays, Samuel

Computers and historical research von Hays, Samuel P. 1921-

An outline of statistics von Hays, Samuel

The response to industrialism 1885 - 1914 von Hays, Samuel P.

Municipal reform in the progressive era whose class interest? von Hays, Samuel P.

The response to industrialism 1885 - 1914 von Hays, Samuel P.

An outline of statistics von Hays, Samuel

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

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

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Wars in the Woods The Rise of Ecological Forestry in America von Hays, Samuel P.