TY  - BOOK
AU  - Keen, Martin L.
AU  - Zaffo, George, J., ill.
TI  - How and why wonder book of sound
T2  - The illustrated theory of science, nature and man's environment
U1  - R 
PY  - 1971///
CY  - New York
PB  - Grosset and Dunlap
ER  -