Thresholds in geomorphology / 
edited by Donald R. Coates, John D. Vitek 
 - Stroudsburg, Pa. :  Dowden & Culver for George Allen & Unwin,  1980 
 - 498 p. :  ill. ;  26 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0045510334 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geomorphology--Congresses