ESTIMATION OF AMMONIUM SOURCES IN INDONESIAN COASTAL ALLUVIAL GROUNDWATER USING Cl- AND GIS. International Journal of Geomate, [S. l.], v. 17, n. 62, p. 53–58, 2019. Disponível em: https://geomatejournal.com/geomate/article/view/611. Acesso em: 9 oct. 2026.