Funes-Guadrón, C. R.; Larios-López, D.; Henríquez-Miranda, B.; Vásquez-Jandres, M.; Cartagena, R.; Marinero-Orantes, E. A.; Benítez-León, J. E. Determination of Mercury, Cadmium, Lead and Arsenic in Rivers of the Mining Area of the Titihuapa River Sub-Basin, Cabañas, El Salvador, C.A. revminerva 2018, 1, 11-14.