Duggal,K.N. <br/><br/>
Elements of Environmental Engineering 

 - 1st,Rep. 
 - New Delhi  S.Chand  2012 
 - XVIII,451p. 
<br/><br/><label>ISBN: </label> Rs.250.00 
<br/><br/><label>Dewey Class. No.: </label>628.1