Lal , Sunder <br/><br/>
Text book of Community Medicine : Preventive and social medicine 

 - 2nd 
 -  CBS Publishers & Distrbutors  
 - 766 
<br/><br/><label>ISBN: </label>978-81-239-1701-6 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Community medicine