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_aTraxler, Greg. _9114720 |
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_aCrop management research and extension : _bthe products and their impact on productiviry _c/by Greg Traxler and Derek Byerlee |
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_aMéxico, D.F. : _bCentro Internacional de Mejoramiento de Maíz y Trigo, _c1992. |
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_aCultivos _xMétodos estadísticos. _930298 |
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_aByerlee, Derek. _916489 |
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_aEconomics paper _v; 5 _935217 |
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