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. Geocelebes [Internet]. 2022 Apr. 27 [cited 2026 Aug. 7];6(1):87-92. Available from: https://journal-598.unhas.ac.id/index.php/geocelebes/article/view/19729