Fletcher, Robert H. <br/><br/>
Clinical epidemiology :  the essentials / 
Robert H. Fletcher, Suzanne W. Fletcher, Edward H. Wagner 
 - Baltimore  :  Williams & Wilkins ,  1996 
 - 276 p.  :  ill.  ;  23 cm. 
<br/><br/> Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0683032690  RM80.20 
<br/><br/><label>LCCN: </label>95-8382 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epodemiologic methods
<br/><br/><label>National Library of Medicine Call No.: </label>WA950