Muhammadakbar, Faisal. “Analisis Risiko Bahaya Hauling Road Pada Penambangan Batubara Di Pt Manrapi Mining Kontraktor Jobsite Panca Agung, Kabupaten Bulungan, Kalimantan Utara”. ReTII (November 9, 2021): 337 -. Accessed April 25, 2024. //journal.itny.ac.id/index.php/ReTII/article/view/2694.