Leon Gordis . <br/><br/>
Epidemiology    Textual Documents 

 - 5th ed. . 
 -  Elsevier,  Pub.  2014 
 - 392. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Dewey Class. No.: </label>614.4  / GOR