ESGUERRA, Norma; 						AMISTAD, Franklin.
 Price Modeling Of The Non-Load Bearing Concrete Hollow Blocks (CHBs) Manufactured In Ilocos Sur.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 36, n. 2, jan. 2016.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/4895" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/4895</a>&gt;. Date accessed: 06 aug. 2025.