TY  - BOOK
AU  -  Barker D. J. P., Hall A. J.
TI  - Practical epidemiology
SN  - 0443044244
U1  - WA105 
PY  - 1991///
CY  - Edinburgh
PB  - Churchill Livingstone
KW  - Epidemiology
N2  -  Epidemiology
ER  -