Espinosa-Calderón, Alejandro, Margarita Tadeo-Robledo, and Alfredo Tapia-Naranjo. 2006. “ an Option to Increase Productivity of Mexico’s High Valley Land Race Corn”. Agronomía Mesoamericana 11 (1):159-61. https://doi.org/10.15517/am.v11i1.17392.