Park , K.   . <br/><br/>
Park`s Textbook of Preventive and Social Medicine /   Textual Documents 

 - 19th /   . 
 - Jabalpur :   M/s Banaridas Bhanot Publishers ,   2007. 
 - 1628 ;    
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Index Terms: </label>Community Medicine  Medical Science 
<br/><br/><label>Dewey Class. No.: </label>614  / PAR