Water pollution control :  a guide to the use of water quality management principles / 
edited by Richard Helmer and Ivanildo Hespanhol. 
 - 1st. ed. 
 - London ;  New York :  E & FN Spon,  1997. 
 - xvi, 510 p. :  ill., maps ; 
<br/><br/> "Published on behalf of UNEP, United Nations Environment Program, Water Supply & Sanitation Collaborative Council, World Health Organization." 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0419229108 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality management.<br/>Water
<br/><br/><label>Dewey Class. No.: </label>363.739/4