Water pollution control :  a guide to the use of water quality management principles / 
edited by Richard Helmer and Ivanildo Hespanhol. 
 - 1st. edition 
 - xvi, 510 pages :  illustrations, maps ;  24 cm. 
<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 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Water quality management.<br/>Water--Purification.<br/>Water--Pollution--Control.
<br/><br/><label>LC Class. No.: </label>TD430 WAT