Levin, Nicole <br/><br/>
Energy and change: level 7 teacher's guide 
de Vos, Jacqueline 
 - Cambridge  Cambridge University Press   2009 
 - 16 Pages  illustrations  26 cm 
<br/><br/> Juvenile 
<br/><br/><label>ISBN: </label>9780521743662 
<br/><br/><label>Dewey Class. No.: </label>J 531.6 LEVI