Fletcher, Robert H. <br/><br/>
Clinical epidemiology:   the essentials/ 
Robert H.  Fletcher... (et.al).. 
 - 2a ed. 
 - Baltimore, Md. :  Willian & Wilkins,  MDo., c1996. 
 - 276p. 
 - c .
<br/><br/><label>ISBN: </label>0-683-03269-0 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Métodos Epidemiológicos
<br/><br/><label>Dewey Class. No.: </label>614.4  / F619c