TY  - BOOK
AU  - SUBRAHMANYAM (N) & BRIJ LAL.
TI  - Text book of optics. Ed 19
SN  - 81 219 0112 X
U1  - 535 SUBT 
PY  - 1989///
CY  - N D
PB  - S. Chand & Co. Ltd.
KW  - Optics
ER  -