“A HYDROGEOLOGY RESEARCH BY USING SCHLUMBERGER GEO-ELECTRIC METHOD IN DISTRICT HAMPARAN PERAK, DELI SERDANG, NORTH SUMATERA”, MEA, vol. 1, no. 1, hlm. 156–161, Mar 2016, Diakses: Okt 17, 2026. Tersedia pada: https://jurnal.abulyatama.ac.id/index.php/mea2016/article/view/579