TY  - BOOK
AU  - Subrahmanyam N. 
AU  - Lal Brij
TI  - A textbook of optics
SN  - 81-219-2611-4 
U1  - 535 
PY  - 2010///
CY  - New delhi
PB  -  S Chand 
KW  - Engineering
ER  -