Ward, R. C. <br/><br/>
Principles of hydrology / 
R.C. Ward, M. Robinson. 
 - 3rd ed. 
 - London ;  New York :  McGraw-Hill,  c1990. 
 - xvi, 365 pages 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0077072049 :  £12.95 
<br/><br/><label>LCCN: </label>88032409  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology.
<br/><br/><label>LC Class. No.: </label>GB 661.2  / .W35 1990 
<br/><br/><label>Dewey Class. No.: </label>551.4