TY  - BOOK
AU  - N.K. Sehgal
AU  - Sarbhai, K.P.
TI  - Optics
U1  - 535 
PY  - 1973///
CY  - Delhi
PB  - Sultan Chand and Sons
KW  - Physics
KW  - Light and Infrared and Ultraviolet Phenomena
ER  -