IDENTIFICATION OF AQUIFERS USING THE GEO-ELECTRIC RESISTIVITY METHOD AND GEO-CHEMICAL ANALYSIS IN THE KARST AREA OF SOUTH MALANG, INDONESIA - Fakhruddin, Fian; Susilo, Adi; Juwono, Alamsyah M; Hermawan, Erwan; Hisyam, Farizky (Jurnal Geosaintek, 2025)