“Evaluasi Kualitas Batubara dari Front Penambangan Hingga Stockpile di Pit 1 Banko Barat PT Bukit Asam Tbk Tanjung Enim: Evaluation of Coal Quality from Mining Front to Stockpile at Pit 1 Banko Barat PT Bukit Asam Tbk Tanjung Enim” (2019) MINERAL, 4(1), pp. 1–7. doi:10.33019/mineral.v4i1.1586.