Roy,Robindranath Saha,Iudranil <br/><br/>
Gupta and Mahajan text book of prevensive and social medicine 

 - 4 
 - New Delhi  Jaypee Borthers  2013 
 - 703 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Community Medicine (614.44)