Siddiq, Raden Herdian Bayu Ash, and Asep Anwar. 2019. “Study of Potential Groundwater Aquifers With Schlumberger Configuration Geo-Electric Method in Palanggai Village East Sumba Regency”. International Journal of Advanced Science and Technology 28 (6), 113 -22. http://sersc.org/journals/index.php/IJAST/article/view/380.