Webb, Penny, <br/><br/>
Essential epidemiology :  an introduction for students and health professionals / 
Penelope Webb, Chris Bain, Andrew Page. 
 - Fourth edition. 
 - xx, 416 pages :  colour illustrations ;  26 cm. 
<br/><br/><label>ISBN: </label>9781108766807 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiologic Methods<br/>Epidemiology