TY - BOOK AU - Subrahmanayam, N AU - Brij Lal AU - Avadhanulu, M.N. TI - A Text Book of Optics SN - 8121904676 U1 - 535.2 PY - 2010/// CY - New Delhi PB - S. Chand and Company KW - Physics KW - Civil Engineering KW - Applied Sc ER -