Rahmayanti, Nur, 		Supriyanto, Supriyanto, AND 		Natalisanto, Adrianus.
" INTERPRETASI PERSEBARAN LAPISAN BATUBARA MENGGUNAKAN GEOPHYSICAL LOGGING PENDEKKATAN KRIGING DI PT. X, DAERAH PROVINSI KALIMANTAN TIMUR" <em>GEOSAINS KUTAI BASIN</em> [Online], Volume 2 Number 2 (31 August 2019)