Gil, P., & Herrera, K. (2003). Monitoring and Quantification of Total Coliforms, Fecal Coliforms and Escherichia Coli, in Seven Micro-basins of Lake Amatitlán. Revista Científica, 16(1), 23–30. https://doi.org/10.54495/Rev.Cientifica.v16i1.235