Hulley, Stephen B. <br/><br/>
DESIGNING clinical research : an epidemiologic approach 

 - Philadelphia  Lippincot Williams & Wilkins  1988 
 - xi, 247 p. 
<br/><br/><label>ISBN: </label>781722187 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Clinical research
<br/><br/><label>Dewey Class. No.: </label>610.7  / DES