Ospina Zuñiga, Oscar, et al. “Assessment of Murky Water and Its Conductivity During Dry and Rainy Seasons in Combeima River (Ibagué, Colombia)”. Ingeniería Solidaria, vol. 12, no. 19, Apr. 2016, pp. 19-36, https://doi.org/10.16925/in.v12i19.1191.