Rizkie, Dania, Eddy Ibrahim, and Budhi Setiawan. “Karakterisasi Geokimia Overburden Tambang Batubara Dengan Metode NAPP Di Area PT. Bukit Asam, Tanjung Enim, Sumatera Selatan”. Ranah Research : Journal of Multidisciplinary Research and Development 6, no. 5 (August 23, 2024): 2218-2222. Accessed February 5, 2025. https://jurnal.ranahresearch.com/index.php/R2J/article/view/1050.