TY  - BOOK
AU  - Chattopadhyay, Deepanwita
TI  - Do & learn science experiments: sound
SN  - 1845575431
U1  - HS Cir 500 C39 2006 
PY  - 2006///
CY  - New Delhi
PB  - Sterling Press (P) Ltd.
KW  - Science
ER  -