Changes in technology and labor requirements in crop production sugar beets
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| 其他作者: | , , |
| 格式: | 圖書 |
| 語言: | English |
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Philadelphia, Pa.
s.n.
1937.
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| 叢編: | Half-title : National research project on reemployment opportunities and recent changes in industrial techniques...Studies of changing techniques and employment in agriculture...[Report no. A-1]
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