The influence of aquifer material to the groundwater potency in Ngawi RegencyIgnasius Loyola Setyawan Purnama, Laelina Rahmawati, Vincentia Anindha Primacintya and Erick FebriartaE3S Web Conf., 325 (2021) 08011DOI: https://doi.org/10.1051/e3sconf/202132508011
