Ball, Sandra. <br/><br/>
Sound and light 
Sandra Ball 
 - ed. 
 - [S.l.]  Scholastic Canada  2005 
 - Pan Canadian Science Place .
 - Pan Canadian Science Place .
<br/><br/><label>ISBN: </label>0779135032 
<br/><br/><label>Dewey Class. No.: </label>P Year 4 [E]