Comely, Richard <br/><br/>
Questions kids ask about inventions 

 - Toronto  Grolier  1989 
 - 31 
 - Questions kids ask .
<br/><br/> Answers such questions as Who invented frozen food?; When was writing invented?; Who invented chewing gum? 
<br/><br/><label>ISBN: </label>9780717225521 
<br/><br/><label>Dewey Class. No.: </label>000  / COM-Q