Duggal, K N <br/><br/>
Elements of environmental engineering 

 - 7 
 -  New Delhi  S Chand  2007 
 - xvii, 440p.   
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>8121915473 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental engineering<br/>Sewerage and sewage treatment<br/>Water  Quantity<br/>Water supply  Sources<br/>Water supply and drainage  buildings<br/>Water treatment