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_aGodwin, R.J. _eautor _988096 |
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_aAgricultural engineering in development _btillage for crop production in areas of low rainfall _cR. J. Godwin |
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_aRome _bFood and Agriculture Organization of the United Nations _c1990 |
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| 490 | 1 | _aFAO agricultural services bulletin | |
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_aCultivo seco. _946458 |
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_aMaquinaria agrícola. _929010 |
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_aOrganización de las Naciones Unidas para la Agricultura y Alimentación _92889 |
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