TY  - BOOK
AU  - VASUDEVA (D N)
TI  - Textbook of light Ed 4
U1  - 534/117 
PY  - 1959///
CY  - Delhi
PB  - Atma Ram  & Sons
KW  - Textbook
KW  - light
KW  - Ed
KW  - 4
ER  -