Mining Operational Technical Study Pit Gaharu Blok 44-45 On Site Sambarata PT. Berau Coal. Journal of International Multidisciplinary Research, [S. l.], v. 1, n. 2, p. 1087–1092, 2023. DOI: 10.62504/9cj5z129. Disponível em: https://journal.banjaresepacific.com/index.php/jimr/article/view/186.. Acesso em: 9 feb. 2026.