“IDENTIFIKASI SEBARAN DAN KETEBALAN LAPISAN BATUBARA BERDASARKAN DATA WELL LOGGING DI PT BORNEO EMAS HITAM LOA TEBU KALIMANTAN TIMUR”. 2020. GEOSAINS KUTAI BASIN 3 (2). https://doi.org/10.30872/geofisunmul.v3i2.680.