Thompson, Tony,  <br/><br/>
Simple slopes 

 - 32 pages :   colour illustrations ;   26 cm 
 - Understanding science series .
 - Understanding science series .
<br/><br/><label>ISBN: </label>9835701423 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science
<br/><br/><label>Dewey Class. No.: </label>500