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| 100 | 1 |
_993628 _aMENZ, K.M. |
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| 260 | _c1980 | ||
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_9140108 _aCERO-LABRANZA |
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_9167809 _aUSO DE LA TIERRA |
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_9164789 _aSISTEMAS AGRICOLAS |
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_9343598 _aZERO TILLAGE |
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| 692 | _aNON TRAVAIL DU SOL | ||
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_tAgricultural Systems (RU) _d1980 _gv.6 p.45-51 |
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| 245 | 1 | 0 | _aUnit farms and farming systems research: the IITA experience |
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_c48788 _d48788 |
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