TY  - BOOK
AU  - Ramamurthy, S  .
AU  - Krishnamurthy,K S  .
AU  - Rajagopalan,P R  .
TI  - Text book of light including geometrical and physical optics / 
U1  - 535 
PY  - 1964///
CY  - Chennai : 
PB  - The National Publishing Co , 
ER  -