Elwood, J. Mark. <br/><br/>
Critical appraisal of epidemiological studies and clinical trials  

 - 2nd ed. 
 - Oxford   New York  1998 
 - x, 448p.  ill.  
<br/><br/><label>ISBN: </label>0192627449 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology<br/>Clinical trials.<br/>Clinical trials<br/>Diseases<br/>Epidemiologic Methods.
<br/><br/><label>LC Class. No.: </label>RA652.4  / E9