TY  - BOOK
AU  - Sethi , N.K..
TI  - Text Book of Optics: For Junior Students
U1  - 535 
PY  - 1953///
CY  - Delhi
PB  - Premier Publishing Co.
KW  - Optics
KW  - G-Physics
KW  - T/G-Physics
N1  - Index
ER  -