Thornbury, William D. <br/><br/>
Principles of geomorphology. 

 - New York :  Wiley,  [1966] 
<br/><br/> First published in 1954. 
<br/><br/>Bibliography. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomorphology.<br/>Geology, Structural.