Park, K. <br/><br/>
Park's Textbook of Preventive and Social Medicine. 

 - 20th 
 -  Banarsidas Bhanot  2009 
 - 832 
<br/><br/><label>ISBN: </label>978-8190607940 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Public Health 
<br/><br/><label>National Library of Medicine Call No.: </label>WA 31 P 2009