TY  - BOOK
AU  - Subrahmanyyam,N.
AU  - lal, Brij.
TI  - A text book of optics
SN  - 8121926114
U1  - 535 22
PY  - 2011///-2012
CY  - New Delhi
PB  - S. Chand
KW  - Optical system and cardinal points
N1  - Dept. of EEE
ER  -