Villagonzalo, D.I. and Zuidberg, B. 2004. Design and performance evaluation of a laser-based photoacoustic system for use in air pollution monitoring in Metro Cebu. Proceedings of the Samahang Pisika ng Pilipinas, 22(1), SPP-2004-PB-03. URL: https://proceedings.spp-online.org/article/view/SPP-2004-PB-03.