TY  - BOOK
AU  - Barker,D.J.P.
AU  - Bennett,F.J.
TI  - Practical epidemiology 
SN  - 0443023034 
AV  - RA652. B3
PY  - 1982///
CY  - Edinburgh , New York 
PB  - Churchill Livingstone
KW  - Epidemiology
ER  -