Rose,G. Barker,D.J.P. <br/><br/>
Epidemiology for the uninitiated 

 - 2nd ed. 
 -  London  British Medical Journal 
 - 71p. 
<br/><br/><label>ISBN: </label>0 7279 0177 X 
<br/><br/><label>LC Class. No.: </label>WA 105.R6