Portillo de Villegas, M., & Gaona R, J. (1991). El frijol en El Salvador: Implicaciones para la investigacion agricola. International Center for Tropical Agriculture.
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Chicago Style (17th ed.) Citation
Portillo de Villegas, ME, and J. Gaona R. El Frijol En El Salvador: Implicaciones Para La Investigacion Agricola. International Center for Tropical Agriculture, 1991.
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MLA (9th ed.) Citation
Portillo de Villegas, ME, and J. Gaona R. El Frijol En El Salvador: Implicaciones Para La Investigacion Agricola. International Center for Tropical Agriculture, 1991.
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Warning: These citations may not always be 100% accurate.