Optics : for B.E, B. tech. and B. Sc. students 2026-02-16T11:17:41+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Raizada, Ritu; Raizada, G. R (Satya Prakashan, 2003)