Fletcher, Robert H. <br/><br/>
Clinical epidemiology : the essentials / 
Clinical epidemiology : the essentials / 
 - 3 
 - Baltimore :  Williams & Wilkins 
 - ix, 276p 
<br/><br/>Incluye índice 
<br/><br/><label>ISBN: </label>0-683-03269-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EPIDEMIOLOGIA