ABETO, Paul Eric C..
 A Performance Assessment Model of Small-Scale Gold Mining Systems in the Philippines Using Benchmarking Strategies.
<strong>Philippine Engineering Journal</strong>, [S.l.], v. 34, n. 2, aug. 2021.
ISSN 2718-9287.
Available at: &lt;<a href="https://www.journals.upd.edu.ph/index.php/pej/article/view/7896" target="_new">https://www.journals.upd.edu.ph/index.php/pej/article/view/7896</a>&gt;. Date accessed: 05 sep. 2025.