Heryanto R, Suyoko S. Karakteristik batubara di Cekungan Bengkulu. Indonesian J. Geosci. [Internet]. 2007 Dec. 28 [cited 2025 Mar. 14];2(4):247-59. Available from: https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/42