Christopherson, Robert W. <br/><br/>
Elemental geosystems / 
Robert W. Christopherson. 
 - Sixth edition. 
 - Upper Saddle River :  Pearson Education Inc.,  2010. 
 - xix, 620 pages :  illustrations. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>9780321595218 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Physical geography.
<br/><br/><label>LC Class. No.: </label>GB 54.5  / CHR 2010.