Amsah, L.O.M.Y., Kurnia, L.H. dan Malim, A.I.L.O. 2022. Analysis of Coal Quality on Mining Front and Ship Loading in East Kalimantan Province: Evaluasi Kualitas Batubara pada Front Penambangan dan Ship Loading di Provinsi Kalimantan Timur. JURNAL GEOCELEBES. 6, 1 (Apr 2022), 87-92. DOI:https://doi.org/10.20956/geocelebes.v6i1.19729.