Fletcher,Robert H <br/><br/>
Clinical Epidemiology : the essentials 

 - 3 
 -  Lipponcott  1996 
 - 276 
<br/><br/><label>ISBN: </label>0-683-03269-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology
<br/><br/><label>National Library of Medicine Call No.: </label>WA950 F 1996