Barker D. J. P., Hall A. J. <br/><br/>
Practical epidemiology   

 - 4th ed. 
 - Edinburgh  Churchill Livingstone  1991 
 - 173 p.  22 cm. 
 -   .
<br/><br/>  
<br/><br/>  Epidemiology 
<br/><br/><label>ISBN: </label>0443044244 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Epidemiology
<br/><br/><label>Dewey Class. No.: </label>WA105  / BAR