Duggal K.N <br/><br/>
Elements Of Enviornmental Engineerinng 
K.N. Duggal 
 - 1st edition 
 - New Delhi  S. Chand & Company  1966 
 - 504 
<br/><br/><label>ISBN: </label>8121915473 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hygien
<br/><br/><label>Dewey Class. No.: </label>628  / DUE