Principles of epidemiology :  a self-teaching guide / 
Lewis H. Roht ... [et al.] 
 - New York :  Academic Press,  1982 
 - 514 p.:  ill.;  24 cm. 
<br/><br/>Includes index. 
<br/><br/><label>ISBN: </label>0125931808 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology.<br/>Epidemiologic Methods.