Assessment of groundwater resources potential using geoelectrical method and slug test in Tegal District, Central Java Province, IndonesiaWahyu Wilopo, Moch Hasmannoor Rachman and Doni Prakasa Eka PutraE3S Web Conf., 200 (2020) 02003DOI: https://doi.org/10.1051/e3sconf/202020002003