de Freitas, M.A. de et al. 2016. Exploratory data analysis of electric conductivity of water in the Serra Geral aquifer system in the Rio Grande do Sul end Santa Catarina States, Brazil. Águas Subterrâneas. 30, 1 (Mar. 2016), 1–17. DOI:https://doi.org/10.14295/ras.v30i1.28518.