Almoro, P.F. and Daza, M.R.H. 1998. Evaluation of printed circuit boards using double-exposure holographic interferometry. Proceedings of the Samahang Pisika ng Pilipinas, 16(1), SPP-1998-OP-01. URL: https://proceedings.spp-online.org/article/view/SPP-1998-OP-01.