“Karakterisasi Batubara Formasi Walanae Daerah Kaloling Kabupaten Sinjai Propinsi Sulawesi Selatan”. Jurnal Geomine 10, no. 03 (December 31, 2022): 292–300. Accessed April 8, 2026. https://jurnal.fti.umi.ac.id/index.php/JG/article/view/1545.