Park J E <br/><br/>
Park's textbook of preventive and social medicine. 

 - 13 
 - Jabalpur  Banarsidas Bhanot Publishers       1991 
 - 509p.  cm. 
<br/><br/><label>Standard No.: </label>30623 
<br/><br/><label>Source: </label> Textual 
<br/><br/><label>Dewey Class. No.: </label>L:5, N1