Rizkie, D., E. Ibrahim, and B. 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, Vol. 6, no. 5, Aug. 2024, pp. 2218-22, doi:10.38035/rrj.v6i5.1050.