“Recharge Area on the Slopes of Volcano Based on Geological Setting, Content of Deuterium and Oxigen Isotopes of Groundwater Chemistry: Case Study on the Slopes of Salak Mountain, West Java” (2019) JOURNAL OF TROPICAL SOILS, 16(3), pp. 245–256. doi:10.5400/jts.2011.v16i3.245-256.