Viveros-Viveros, Héctor, Alfredo R Camarillo-Luna, Cuauhtémoc Sáenz-Romero, and Armando Aparicio-Rentería. 2017. “Altitudinal Variation in Morphological Traits of Pinus Patula Populations from Oaxaca State, Mexico, and Its Use in the Zoning”. Bosque 34 (2):173-79. https://doi.org/10.4067/S0717-92002013000200006.