TY  - BOOK
AU  - Hutchison, David E.
TI  - Sound waves
T2  - National science curriculum material ; P9
SN  - 771574193
U1  - 534 
PY  - 1975///
CY  - Agincourt, Ont. : 
PB  - Gage Educational Pub, Jacaranda Press
KW  - Sound-waves
KW  - Sound
N1  - Includes index
ER  -