TY  - BOOK
AU  - Subrahmanyam, N.
AU  - Avadhanulu, M. N.
AU  - Lal, Brij
TI  - A textbook of optics
SN  - 8121926114
U1  - 535 
PY  - 2008///
CY  - New Delhi
PB  - S. Chand  and Company
KW  - Optik
ER  -