KARO-KARO, Pulung; 						SEMBIRING, Simon.
 Coal Ash Characteristic from Bukit Asam as Raw Material for Ceramics Production.
<strong>Jurnal ILMU DASAR</strong>, [S.l.], v. 9, n. 2, p. 127-134, july 2008.
ISSN 2442-5613.
Available at: &lt;<a href="https://jurnal.unej.ac.id/index.php/JID/article/view/157" target="_new">https://jurnal.unej.ac.id/index.php/JID/article/view/157</a>&gt;. Date accessed: 22 nov. 2024.