Barker, D.J.P.  Bennett, F.J. <br/><br/>
Practical epidemiology 

 - 2nd 
 - Singapore  Churchill livingstone  1976 
 - 180p. 
<br/><br/> Book 
<br/><br/><br/>Eng. 
<br/><br/><label>ISBN: </label>0443019320 
<br/><br/><label>National Library of Medicine Call No.: </label>WA 105