Romero, Raymundo V., Nelson V. Romero, and Fe B. Romero. “Insulated Metal Sheet Roofing”. Asia Pacific Higher Education Research Journal (APHERJ) 4, no. 1 (August 22, 2017). Accessed October 23, 2026. https://www.po.pnuresearchportal.org/ejournal/index.php/apherj/article/view/434.