Experience with Human Factors in Agricultural Areas of the World /
| Fformat: | Llyfr |
|---|---|
| Iaith: | English Spanish |
| Cyhoeddwyd: |
Washington, D.C. :
Extension Service, U.S. Department of Agriculture, .
1949.
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| Pynciau: |
| Disgrifiad Corfforoll: | 22 páginas ; 26 cm |
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