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_aSprague, George Frederick. _9109270 |
| 245 | 1 | 4 | _aThe development of hybrid corn technolgy in the United States and selected countries |
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_aWashington : _bAgency for International Development, _c1975 |
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| 300 | _a81 p. | ||
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_aAgriculture technology for developing countries. Technical series bulletin _v; 16 |
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_aMaíz _xHíbridos. _970974 |
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_aMaíz _xMejoramiento. _971006 |
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_aMaíz _xProteínas. _971043 |
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_aAgriculture technology for developing countries. Technical series bulletin _v; 16 |
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