Norell, Staffan E. <br/><br/>
A short course in epidemiology / 
by Staffan E. Norell. 
 - New York:  Raven Press,  1992. 
 - 192 p. ;  24 cm. 
<br/><br/><label>ISBN: </label>0881678422 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Case--Control studies.<br/>Cohort studies.<br/>Research design.