TY  - BOOK
AU  - N.Subrahmanyam
AU  - " Brij Lal , M.N.Avadhanulu,,,"
TI  - A Text Book of Optics (23nd ed.)
SN  - 8121926114
U1  - 530.1 
PY  - 2006///
CY  - NEW DELHI
PB  - S. Chand
KW  - Physics
N1  - Quantity Number:  20
ER  -