Thornbury, William D.   1900- <br/><br/>
Principles of geomorphology 
[by] William D. Thornbury. 
 - 2d ed. 
 - New York,  Wiley  [1968, c1969] 
 - xi, 594 p.  ill., maps.  23 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0471861979 
<br/><br/><label>LCCN: </label>68-008323 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomorphology.
<br/><br/><label>Dewey Class. No.: </label>551.4