Modelling and Estimation of Coal Resources Using Circular Method in Beringin Makmur II Area, North Musi Rawas Regency. PROMINE [Internet]. 2022 Dec. 27 [cited 2026 Apr. 17];10(2):44-50. Available from: https://www.journal.ubb.ac.id/index.php/promine/article/view/3842