d.j.p. barker <br/><br/>
pratical epidemiology 

 - edinburgh  the english lauguage book society  1976 
 - 180 
<br/><br/><label>ISBN: </label>0-443-01932 0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>medicine
<br/><br/><label>Dewey Class. No.: </label>614.49/B2411P