Research methods on farm use of tractors /
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York :
Columbia University Press,
1938.
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| Series: | Columbia university studies in the history of American agriculture. no. 5
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| Subjects: |
| Physical Description: | xxvi, 273 pages including tables, diagrams ; 23 cm. |
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| Bibliography: | Bibliography: pages 261-265. |