Mahajan , B. K.  . <br/><br/>
Text book of Prcventive &  Social Medicine /   Textual Documents 

 - 2nd /   . 
 -  Jaypee Brothers Med. Pub. ,   1995. 
 - 346 ;    
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Index Terms: </label>PSM 
<br/><br/><label>Dewey Class. No.: </label>614  / MAH