Water Pollution Indexes Proposal for a High Andean River Using Multivariate Statistics: Case of Chumbao River, Andahuaylas, Apurímac. - Ramos-Pacheco, Betsy S.; Choque-Quispe, David; Ligarda-Samanez, Carlos A.; Solano-Reynoso, Aydeé M.; Choque-Quispe, Yudith; Aguirre Landa, John Peter; Agreda Cerna, Henrry W.; Palomino-Rincón, Henry; Taipe-Pardo, Fredy; Zamalloa-Puma, Miluska M.; Zamalloa-Puma, Lourdes Magaly; Mescco Cáceres, Edwin; et al. (Water (20734441), 2023)