Quiroz Fernández, L.S., Izquierdo Kulich, E. and Menéndez Gutiérrez, C. 2018. STUDY OF THE ENVIRONMENTAL IMPACT OF WASTEWATER DISCHARGES ON THE SELF-PURIFICATION CAPACITY IN PORTOVIEJO RIVER, ECUADOR. Centro Azúcar Journal. 45, 1 (Jan. 2018), 11.