TY  - BOOK
AU  - SUBRAHMANYAM (N)
AU  - LAL (Brij)
TI  - Text book of optics
U1  - 534/176 UGC 
PY  - 1989///
CY  - New Delhi
PB  - S. Chand & Co. Ltd.
KW  - Text
KW  - optics
KW  - book
ER  -