Macalalad, E.P., Chua, H.W., Bangsal, E.B., Vallar, E.A. and Galvez, M.C.D. 2007. Atmospheric turbidity parameters measurement over Manila. Proceedings of the Samahang Pisika ng Pilipinas, 25(1), SPP-2007-2G-04. URL: https://proceedings.spp-online.org/article/view/SPP-2007-2G-04.