Park ,k. <br/><br/>
Textbook of preventive and social medicine, 

 - 18 
 -  Banaras Das   2005 
 - 711,p.,  NO 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Comm Med
<br/><br/><label>Dewey Class. No.: </label>614.4  / PAR