EL HAKIM, Muhammad; BAIHAKI, Imam; WIRATAMA, Jarot; YOVANDA, Ridho. Estimasi Sumberdaya Batubara Menggunakan Metode Polygon Di Pt Bumi Indo Power, Kabupaten Tanjung Jabung Barat, Provinsi Jambi. JTK (Jurnal Teknik Kebumian), [S. l.], v. 13, n. 02 (April), p. 49–57, 2025. DOI: 10.22437/jtk.v13i02.47456. Disponível em: https://www.online-journal.unja.ac.id/jtk/article/view/47456. Acesso em: 17 may. 2026.