| Conservation and the Gospel of Efficiency The Progressive Conservation Movement, 1890-1920 | | | Author:
| Hays, Samuel P. | | ISBN: | 978-0-689-70091-0 | | Publication Date: | Jan 1969 | | Publisher: | Simon & Schuster
| | Imprint: | Scribner Paper Fiction | | Book Format: | Paperback | | List Price: | USD $4.95 |
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