Anna Fadliah Rusydi, Shin-ichi Onodera, Mitsuyo Saito, Seiichiro Ioka, and Rizka Maria. “ESTIMATION OF AMMONIUM SOURCES IN INDONESIAN COASTAL ALLUVIAL GROUNDWATER USING Cl- AND GIS”. GEOMATE Journal, vol. 17, no. 62, Oct. 2019, pp. 53-58, https://geomatejournal.com/geomate/article/view/611.