DÍAZ, J. E.; RIVERA, C. L.; FIGUEROA, J. A. Vulnerability a the aquifer contamination in yumbo municipality valle del cauca. Ingeniería y Región, [S. l.], v. 10, p. 15–22, 2013. DOI: 10.25054/22161325.753. Disponível em: https://journalusco.edu.co/index.php/iregion/article/view/753. Acesso em: 3 jul. 2024.