Halpern, Judy. <br/><br/>
Rocks and minerals 
Judy Halpern 
 - ed. 
 - [s.l.]  Pearson  2014 
 - 32 p. 
 - Big idea .
 - Big idea .
<br/><br/><label>ISBN: </label>9781770587298 
<br/><br/><label>Dewey Class. No.: </label>P Year 4 500