Pujiindiyati, E.R. et al. 2015. Study of Susceptibility of Pari Island Groundwater – To Surface Water Using Natural Isotopes and Hydrochemicals. Jurnal Ilmiah Aplikasi Isotop dan Radiasi. 10, 2 (Nov. 2015), 137–148. DOI:https://doi.org/10.17146/jair.2014.10.2.2721.