Ernia, Yuyun, 		Djayus, Djayus, AND 		Supriyanto, Supriyanto.
" IDENTIFIKASI SEBARAN DAN KETEBALAN LAPISAN BATUBARA BERDASARKAN DATA WELL LOGGING DI PT BORNEO EMAS HITAM LOA TEBU KALIMANTAN TIMUR" <em>GEOSAINS KUTAI BASIN</em> [Online], Volume 3 Number 2 (28 August 2020)