PERHITUNGAN CADANGAN BATUBARA TERBUKTI DENGAN METODE CROSS SECTION. Jurnal Geologi Pertambangan (JGP), [S. l.], v. 2, n. 16, 2014. DOI: 10.53640/jgp.v2i16.121. Disponível em: https://ejurnal.unikarta.ac.id/index.php/jgp/article/view/121. Acesso em: 24 aug. 2025.