Gregory, K. J. (Kenneth John), 1938- <br/><br/>
Drainage basin form and process :  a geomorphological approach / 
K.J. Gregory, D.E. Walling 
 - London :  Edward Arnold,  1973 
 - 456 p. :  ill. ;  25 cm 
<br/><br/>Bibliography: p.(407)-447 
<br/><br/><label>ISBN: </label>0470151986 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Watersheds