Designing clinical research :  an epidemiologic approach / 
by Stephen B. Hulley ... [et al.]. 
 - 2nd ed. 
 - Philadelphia :  Lippincott Williams & Wilkins,  c2001. 
 - xv, 336 p. :  ill. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0781722187 9780781722186 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiologic Methods<br/>Research Design
<br/><br/><label>National Library of Medicine Call No.: </label>WA 950  / .D47 2001