Barker, D. J. P.   . <br/><br/>
Practical Epidemiology /   Textual Documents 

 -  ELBS ,   1982. 
 - 155:   
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Index Terms: </label>Medical Science 
<br/><br/><label>Dewey Class. No.: </label>614.4  / BAR