TY  - BOOK
AU  - Subrahmanyam N; Lal Brij
AU  - Subrahmanyam N; Lal Brij
TI  - Textbook of optics
SN  - 8121904676 (pbk)
U1  - C5, K8;N9 
PY  - 1999///
CY  - New Delhi
PB  -  S Chand     
KW  -  Dispersion
KW  -  Optical instruments
KW  - Refraction
ER  -