Gonz´alez Jácome, Alba, and Laura Reyes Montes. “Traditional Agricultural Knowledge: The Cornfield and Nutrition: The Case of the Valley of Ixthahuaca, State of Mexico”. Revista De Geografía Agrícola, no. 52-53, June 2015, pp. 21-42, doi:10.5154/r.rga.2014.53.002.