Maximiliano Martínez, J. and Castellanos Suárez, J.A. 2020. Environment and cargo system in Otomí communities of the State of Mexico: case study of San Mateo El Viejo. Revista Mexicana de Ciencias Agrícolas. 11, 7 (Nov. 2020), 1693–1700. DOI:https://doi.org/10.29312/remexca.v11i7.2676.