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

 - New Delhi  S. Chand & Company Ltd  1966 
 - 412 
<br/><br/><label>Publisher. No.: </label> Veena Book Centre 
<br/><br/><label>Subjects--Personal Names: </label> Environmental Science 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental Science