Sackett, David L. <br/><br/>
Clinical Epidemiology :  A basic science for clinical medicine / 
D.L. Sackett, R.B. Haynes, P. Tugwell. 
 - Boston ;  Toronto :  Little, Brown and Company,  1985. 
 - xiii, 370 p. :  ill. ;  23 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>0-316-76595-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology