Quinteros, Edgar, and Roberto Mejía. “Microbiological Quality of Bottled Water in El Salvador 2014 - 2015”. Alerta, Revista científica del Instituto Nacional de Salud 1, no. 1 (June 29, 2018): 26–34. Accessed December 5, 2025. https://camjol.info/index.php/alerta/article/view/6587.