Friis, Robert H. <br/><br/>
Epidemiology For Public Health Practice :  Epidemiology For Public Health Practice / 
Friis, Robert H. 
 - 4th ed. 
 - xxii, 717 p. ; 23 cm. 
<br/><br/><label>ISBN: </label>9780763751616 
<br/><br/><label>Dewey Class. No.: </label>614.4