Kelsey, Jennifer L.  Whittemore, Alice S.  Evns, Alfred S.  Thompson, W. Dougls <br/><br/>
Methods in observational epidemiology 

 - 2nd 
 - New York  Oxford University Press  1996 
 - 432p. 
 - 26 .
<br/><br/> Book 
<br/><br/><br/>Eng. 
<br/><br/><label>ISBN: </label>0195083776 
<br/><br/><label>National Library of Medicine Call No.: </label>WA 105