PANGESTU, A. B. Estimasi Cadangan Batubara Pt Murung Raya Coal Dengan Metode Cross Section Di Pt Murung Raya Coal Kec. Laung Tuhup Dan Tanah Siang, Kab. Murung Raya Prov. Kalteng. ReTII, [S. l.], 2018. Disponível em: https://journal.itny.ac.id/index.php/ReTII/article/view/681. Acesso em: 20 may. 2025.