Mattos, J.B. and Silva, K.B. 2019. Application of self-organizing maps and GIS: spatial analysis of hydrochemistry of the aquifers in a Brazilian medium-size city. Águas Subterrâneas. 33, 2 (Jun. 2019), 210–220. DOI:https://doi.org/10.14295/ras.v33i2.29176.