Sardi, Bambang, Moh. Ripky, Fitrawati Marhum, Supardin Nompo, and Muhammad Arif. 2023. “Analisis Proksimat, Ultimat, Dan Kadar Sulfur Dalam Penentuan Kualitas Batubara Pada Formasi Bobong Pulau Taliabu-Maluku”. Sultra Journal of Mechanical Engineering 2 (1), 45-53. https://doi.org/10.54297/sjme.v2i1.443.