Analysis of Groundwater Vulnerability to contamination in Wonosari Basin and Gunungsewu Karst Transition Zone, Yogyakarta, IndonesiaRelinda Dewi Astabella, Margaretha Widyastuti and Tjahyo Nugroho AdjiE3S Web Conf., 468 (2023) 08002DOI: https://doi.org/10.1051/e3sconf/202346808002