León Velarde, C., & Quiróz, R. (1999). Crop-livestock systems research in the Andean region: Ecoregional approach, methods and procedures. International Livestock Research Institute.
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Cita Chicago Style (17a ed.)
León Velarde, C.U., y R. Quiróz. Crop-livestock Systems Research in the Andean Region: Ecoregional Approach, Methods and Procedures. International Livestock Research Institute, 1999.
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Cita MLA (9a ed.)
León Velarde, C.U., y R. Quiróz. Crop-livestock Systems Research in the Andean Region: Ecoregional Approach, Methods and Procedures. International Livestock Research Institute, 1999.
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