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_aPingali, Prabhu L. _988191 |
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_aCereal crop productivity in developing countries : _bpast trends and future prospects _c/by Prabhu L. Pingali and Paul W. Heisey |
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_aMéxico, D.F. : _bCentro Internacional de Mejoramiento de Maíz y Trigo, _c1999. |
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_a32 p. : _bgráfs. ; tablas |
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_aEconomics. Working paper _v; 99-03 |
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_aArroz _xRendimiento. _97651 |
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_aCereales _xPaíses subdesarrollados. _921449 |
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_aMaíz _xRendimiento. _971051 |
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_aTrigo _xRendimiento. _9115092 |
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_aHeisey, Paul W. _953382 |
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_aCIMMYT _923309 |
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_aEconomics. Working paper _v; 99-03 _935222 |
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| 905 | _aAlejandra Carrasco M. | ||
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