National physics congress University of the Philippines, Baguio City, Samahang Pisika ng Pilipinas, & Danilo M. Yanga. (1988). Progress of the theoretic0al and experimental physics (1987): Proceedings of the sixth national physics congress held at University Philippines Baguio, 22-24 May 1987. Samahang Pisika ng Pilipinas.

National physics congress University of the Philippines, Baguio City, Samahang Pisika ng Pilipinas, and Danilo M. Yanga. Progress of the Theoretic0al and Experimental Physics (1987): Proceedings of the Sixth National Physics Congress Held at University Philippines Baguio, 22-24 May 1987. Quezon City: Samahang Pisika ng Pilipinas, 1988.

National physics congress University of the Philippines, Baguio City, et al. Progress of the Theoretic0al and Experimental Physics (1987): Proceedings of the Sixth National Physics Congress Held at University Philippines Baguio, 22-24 May 1987. Samahang Pisika ng Pilipinas, 1988.