RIZAL, Yan.
 POTENSI PENGAYAAN TIMAH PRIMER DAN SEKUNDER SERTA UNSUR TANAH JARANG DI DAERAH SIMPANG PESAK, KABUPATEN BELITUNG TIMUR.
<strong>Bulletin of Geology</strong>, [S.l.], v. 5, n. 3, p. 685-707, july 2021.
ISSN 2580-0752.
Available at: &lt;<a href="https://buletingeologi.com/index.php/buletin-geologi/article/view/142" target="_new">https://buletingeologi.com/index.php/buletin-geologi/article/view/142</a>&gt;. Date accessed: 26 apr. 2024.