ANDINI, Ayu; 						RIZAL, Yan.
 GEOLOGI BATUBARA DAERAH BINUNGAN KECAMATAN SAMBALIUNG KABUPATEN BERAU PROVINSI KALIMANTAN TIMUR.
<strong>Bulletin of Geology</strong>, [S.l.], v. 3, n. 1, p. 271-278, apr. 2019.
ISSN 2580-0752.
Available at: &lt;<a href="https://buletingeologi.com/index.php/buletin-geologi/article/view/58" target="_new">https://buletingeologi.com/index.php/buletin-geologi/article/view/58</a>&gt;. Date accessed: 19 apr. 2024.
doi: <a href="https://doi.org/10.5614/bull.geol.2019.3.1.1">https://doi.org/10.5614/bull.geol.2019.3.1.1</a>.