Gordis, Leon. <br/><br/>
Epidemiology / 
Leon Gordis. 
 - 3rd ed. ,updated ed. 
 - Philadelphia :  Elsevier,  2004. 
 - xi, 335 p. :  ill. ;  25 cm. 
<br/><br/><label>ISBN: </label>1416025308 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology.