Taylor, Barbara <br/><br/>
I wonder why zips have teeth and other questions about inventions / 
Barbara Taylor. 
 - Danbury,CT :  Grolier,  2007. 
 - 32 p. : col. ill.:  29 cm. 
 - I wonder why .
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>0-7534-0525-3 
<br/><br/><label>LC Class. No.: </label>608 T21z