LEVIN, Harold L. <br/><br/>
EARTH THROUGH TIME 

 - 6th Ed. 
 -  Saunders College Publishing, Fort Worth   1999 
<br/><br/><label>ISBN: </label>0 03 023751 3 
<br/><br/><label>Dewey Class. No.: </label>550.09  / LEV/EE