Hulley, Stephen B <br/><br/>
Designing clinical research. (4th ed.) 
by Stephen B. Hulley [and others] 
 - 4th ed. 
 - Philadephia:  Lippincolt Williams and Wilkins  2013 
 - xiii, 367p.: 
<br/><br/> includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781608318049 
<br/><br/><label>Subjects--Topical Terms: </label><br/>EPIDEMIOLOGIC METHODS<br/>RESEARCH DESIGN
<br/><br/><label>LC Class. No.: </label>R 853.C55 Des