TY  - BOOK
AU  - Subrahmanyam, N. and Lal, Brij. 
TI  - A text book of optics
SN  - 812190112X
AV  - ACC. No. 1774 
U1  - 535.21 22
PY  - 1988///
CY  - New Delhi
PB  - S.Chand and Company
ER  -