Juradi, Muhammad Idris. “Correlation Study Of Sulphur and Ash Content In Patappa Coal Area Pujananting Sub-District Barru District”. Journal of Geology and Exploration 3, no. 2 (December 31, 2024): 55–58. Accessed December 23, 2025. https://ejournal.insightpublisher.com/index.php/JGE/article/view/173.