TIRTADIWANGSA, Fatahilah; WIDAGDO, Asmoro. Estimasi Sumberdaya Batubara Menggunakan Metode Poligon Pada Seam D Daerah Lahat, Sumatera Selatan: Coal Resources Estimation Using the Polygon Method on Seam D Lahat Area, South Sumatera. Jurnal Teknologi Sumberdaya Mineral, [S. l.], v. 3, n. 1, p. 11–17, 2022. DOI: 10.19184/jeneral.v3i1.30645. Disponível em: https://jeneral.jurnal.unej.ac.id/index.php/JENERAL/article/view/30645. Acesso em: 10 aug. 2025.