Christopherson, Robert W. <br/><br/>
Geosystems :  an introduction to physical geography / 
Robert W. Christopherson. 
 - 3rd ed. 
 - Upper Saddle River, N.J. :  Prentice Hall,  1997. 
 - 1 v. (various pagings) :  ill. ;  27 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780135053140 
<br/><br/><label>LCCN: </label>96-016334 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography.