Cedeño Álava, V. et al. 2025. Spatial Variation of Fecal Coliform Contamination in the Portoviejo River, Manabí Province. Revista Tecnológica - ESPOL. 37, 1 (Jun. 2025), 348–364. DOI:https://doi.org/10.37815/rte.v37n1.1271.