Thornbury, William D. <br/><br/>
Principles of geomorphology / 
William D. Thornbury. 
 - 2nd ed. 
 - New York :  Wiley,  1969. 
 - xi, 594 p. :  ill., maps. 
<br/><br/> "Wiley International edition." 
<br/><br/><label>ISBN: </label>0471861979 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Landforms.<br/>Geomorphology.