Ward, R. C. <br/><br/>
Principles of hydrology / 
R.C. Ward 
 - 2nd ed. 
 - London :  McGraw-Hill,  c1975 
 - xvi, 367 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0070840563 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hydrology.
<br/><br/><label>Dewey Class. No.: </label>551.48  / WAP 1975