Roy,R.N. <br/><br/>
Mahajan & Gupta Textbook of Preventive and Social Medicine 

 - 4th Ed. 
 - New Delhi  Jaypee Pub  2013 
 - 703 p 
<br/><br/><label>ISBN: </label>8180610705  Rs. 895 
<br/><br/><label>Dewey Class. No.: </label>610.7343  / ROY