TY  - GEN
AU  - Subrahmanyam, N
AU  - Lal, Brij
AU  - Avadhanulu, MN
TI  - A Text book of optics
SN  - 8121926114
U1  - 535 
PY  - 2000///
CY  - New Delhi
PB  - S.Chand
KW  - Optics
ER  -