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]. 27 April 2022 [dikutip 21 Agustus 2026];6(1):87-92. Tersedia pada: https://journal.unhas.ac.id/index.php/geocelebes/article/view/19729