Kajian Analisis Kualitas Batubara PT. Khotai Makmur Insan Abadi Site Separi 3 Kecamatan Tenggarong Seberang Kabupaten Kutai Kartanegara Kalimantan Timur. Jurnal Geologi Pertambangan (JGP), [S. l.], v. 26, n. 2, p. 39–51, 2020. DOI: 10.53640/jgp.v26i2.832. Disponível em: https://ejurnal.unikarta.ac.id/index.php/jgp/article/view/832. Acesso em: 24 aug. 2025.