Gray, N.F. <br/><br/>
Water technology :  an introduction for scientists and engineers / 
N.F. Gray. 
 - London :  New York :  Arnold ;  Wiley,  1999. 
 - xi, 548 p. :  ill. ;  25 cm. 
<br/><br/> Includes index. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0340676450 (pbk.) 0470236329 (Wiley) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality management.<br/>Sewage disposal.<br/>Freshwater biology.<br/>Water quality biological assessment.<br/>Water-supply.<br/>Aquatic biology.<br/>Water-supply engineering.