Kelsey, Jennifer L. <br/><br/>
Methods in observational epidemiology  

 - New York   Oxford University Press  1986 
 - vi, 366 p.   ill.  
<br/><br/><label>ISBN: </label>0195036573  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology<br/>Epidemiologic Methods.
<br/><br/><label>LC Class. No.: </label>RA652.4  / K45