Duggal K N <br/><br/>
Elements of Enviornmental Engineering 

 - 1st 
 -  "Chand & Co,New Delhi"  2009 
<br/><br/> YES 
<br/><br/><label>ISBN: </label>81-219-1547-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environment Engg Mechanical 
<br/><br/><label>Dewey Class. No.: </label>