Barker, D. J. P. (David James Purslove) <br/><br/>
Practical epidemiology. 
D.J.P. Barker and A.J. Hall. 
 - 4th. 
 - Edinburgh :  ELBS,  1991. 
<br/><br/>Bibliography 
<br/><br/><label>ISBN: </label>0443044244 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology.
<br/><br/><label>LC Class. No.: </label>RA652.4  / Bar 1991