Spencer, Edgar Winston. <br/><br/>
Earth science :  understanding environmental systems / 

 - Boston   McGraw-Hill,  2003. 
 - xxi, 518 p. :  ill. (col., maps) ;  28 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0072341467  
<br/><br/><label>LC Class. No.: </label>QE28  / .Sp3 2003