NASRUDDIN, Nasruddin. Spatial Characteristic of Coal Mining in Kutai Kartarnegara Regency, East Kalimantan Province. Sumatra Journal of Disaster, Geography and Geography Education, [S. l.], v. 1, n. 2, p. 152–154, 2017. DOI: 10.24036/sjdgge.v1i2.101. Disponível em: http://sjdgge.ppj.unp.ac.id/index.php/Sjdgge/article/view/101. Acesso em: 27 oct. 2026.