Pérez, H., Anrango, M.J., Villagrán, G., Ortiz, D., Chela, L. and Fernández, L. 2021. Biogeographic Determination (life zones) in the Province of Pichincha. Ecuadorian Science Journal. 5, 3 (Nov. 2021), 239-261. DOI:https://doi.org/10.46480/esj.5.3.158.