Analisa Variasi Litologi Kegiatan Pemboran Batubara Metode Touch Core Di PT. Nata Energi Site PT. Perkasa Energy. Jurnal Geologi Pertambangan (JGP), [S. l.], v. 29, n. 1, p. 37–44, 2023. DOI: 10.53640/jgp.v29i1.1177. Disponível em: https://ejurnal.unikarta.ac.id/index.php/jgp/article/view/1177. Acesso em: 24 aug. 2025.