Christopherson, Robert W. <br/><br/>
Geosystems: an introduction to physical geography 

 - 6th ed. 
 - New Jersey  Pearson  2006 
 - xxi, 689p.   
<br/><br/>  Includes CDROM 
<br/><br/><label>ISBN: </label>0-13-153117-4 
<br/><br/><label>ISSN: </label>
<br/><br/><label>Subjects--Index Terms: </label>Physical geography 
<br/><br/><label>Dewey Class. No.: </label>911.2