Magallanes-Quintanar, Rafael, Fidel Blanco-Macías, Erick Carlos Galván-Tejada, Jorge Isaac Galván-Tejada, Miguel Márquez-Madrid, and Ricardo David Valdez-Cepeda. “Negative Regional Standardized Precipitation Index Trends Prevail in the Mexico’s State of Zacatecas”. REVISTA TERRA LATINOAMERICANA 37, no. 4 (October 28, 2019): 487–499. Accessed July 16, 2024. https://terralatinoamericana.org.mx/index.php/terra/article/view/563.