A bibliography for small and organic farmers 1920-78
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| Format: | Texto biblioteca |
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Washington, D.C. (USA) U.S. Dept. of Agriculture, Science and Education Administration
Apr
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| Subjects: | ORGANIC AGRICULTURE, FERTILIZERS, GREEN MANURES, ORGANIC FERTILIZERS, AGRICULTURE BIOLOGIQUE, AGRICULTURA ORGANICA, ENGRAIS, ENGRAIS VERT, ENGRAIS ORGANIQUE, ABONOS, ABONOS VERDES, ABONOS ORGANICOS, |
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