| 著者: | W L McAtee; F E L Beal |
|---|---|
| 出版商: | Washington, D.C. : U.S. Dept. of Agriculture, 1912. |
| 丛书: | Farmers' bulletin (United States. Dept. of Agriculture), no. 497. |
| 版本/格式: |
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| 评估: |
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