Conservation of our natural resources, based on Van Hise's The conservation of natural resources in the United States
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| OCLC: | 6011852 |
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| 主要作者: | |
| 其他作者: | , , |
| 语言: | English |
| 出版: |
New York,
Macmillan company,
193l [c1930]
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| 主题: | |
| 格式: | Monograph Note that CRL will digitize material from the collection when copyright allows. |