Ramírez Jaspeado Araceli, et al. “Morphological Characterization of an Ethnographic Sample of Maize (Zea Mays L.) Ball Race of Oaxaca”. Revista Mexicana De Ciencias Agrícolas, vol. 4, no. 6, Apr. 2018, pp. 895-07, https://doi.org/10.29312/remexca.v4i6.1157.