TY  - GEN
AU  - Ray, K. D.
TI  - Light
U1  - 535 
PY  - 1981///
CY  - Calcutta
PB  - Indian book concern
KW  - OPTICS
N1  - This book has two parts . Pt. 1. Geometrical optics. - Pt. 2. Physical optics
ER  -