TY  - BOOK
AU  - KHANNA  (D R)
AU  - BEDI (R S)
TI  - Textbook of sound Ed 7
U1  - 534/56 
PY  - 1962///
CY  - Delhi
PB  - Atma Ram  & Sons
KW  - Textbook
KW  - sound
KW  - Ed
KW  - 7
ER  -