TY  - BOOK
AU  - BARKER, D. J. P. and HALL, A. J.
TI  - Practical Epidemiology
SN  - 0443044244
U1  - 614.4  BAR 
PY  - 1973///,
CY  - UK
PB  - Longman Group Ltd.
KW  - Public Health
N1  - Includes index
ER  -