Gupta , Piyush  <br/><br/>
Text book of  Preventive and Social Medicine 

 - 2nd 
 -  Japee Brothers Medical Publishers 
 - 854 
<br/><br/><label>ISBN: </label>81-239-1457-1 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Medicine