INTERPRETASI PERSEBARAN LAPISAN BATUBARA MENGGUNAKAN GEOPHYSICAL LOGGING PENDEKKATAN KRIGING DI PT. X, DAERAH PROVINSI KALIMANTAN TIMUR. geo. sci. kut. bas. [Internet]. 2019 Aug. 31 [cited 2025 Sep. 5];2(2). Available from: https://jurnal.fmipa.unmul.ac.id/index.php/geofis/article/view/467