ANTONIO, JR., Oscar Victor M.; 						ZARCO, Mark Albert H..
 Engineering Properties of Calaca Batangas Bottom Ash.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 28, n. 1, july 2011.
ISSN 2718-9287.
Available at: &lt;<a href="https://journals.upd.edu.ph/index.php/pej/article/view/2213" target="_new">https://journals.upd.edu.ph/index.php/pej/article/view/2213</a>&gt;. Date accessed: 28 sep. 2025.