Productive farming,
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| OCLC: | 1736567 |
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| 主要作者: | |
| 语言: | English |
| 出版: |
Philadelphia and London,
J.B. Lippincott company
[c1917]
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| 版: | 3d ed., rev. and enl. |
| 主题: | |
| 格式: | Monograph Note that CRL will digitize material from the collection when copyright allows. |
| Item Description: | "References" at end of chapters. |
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| 实物描述: | viii, 417, xv, 419-429 p. front., illus. 20 cm. |