TY  - BOOK
AU  - Comely, Richard
AU  - Dickie, Alison
TI  - Questions kids ask about inventions
T2  - Questions kids ask
SN  - 9780717225521
U1  - 000 
PY  - 1989///
CY  - Toronto
PB  - Grolier
N2  - Answers such questions as Who invented frozen food?; When was writing invented?; Who invented chewing gum?
ER  -