Conservation of natural resources - History. - United States
概要
| 作品: | 6 作品在 0 項出版品 0 種語言 | |
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書目資訊
Conservation and the gospel of efficiency : = the progressive conservation movement, 1890-1920 /
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Nature's New Deal = The Civilian Conservation Corps and the Roots of the American Enviromental Movement
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主題