TY  - BOOK
AU  - Barker,D.J.P;Hall,A.J.Hall;
TI  - Practical Epidemiology
SN  - 0443047316
U1  - WA 105B255P 1991. 
PY  - 1991///
CY  - Edinburgh
PB  - Churchill Livingstone.
KW  - Epidemiology
N1  - includes index
ER  -