TIRTADIWANGSA, Fatahilah; 						WIDAGDO, Asmoro.
 Estimasi Sumberdaya Batubara Menggunakan Metode Poligon Pada Seam D Daerah Lahat, Sumatera Selatan.
<strong>Jurnal Teknologi Sumberdaya Mineral</strong>, [S.l.], v. 3, n. 1, p. 11-17, june 2022.
ISSN 2798-4850.
Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/JENERAL/article/view/30645" target="_new">https://jurnal.unej.ac.id/index.php/JENERAL/article/view/30645</a>&gt;. Date accessed: 27 apr. 2024.
doi: <a href="https://doi.org/10.19184/jeneral.v3i1.30645">https://doi.org/10.19184/jeneral.v3i1.30645</a>.