TY  - GEN
AU  - Yarnell, John 
TI  - Epidemiology and prevention : a systems - based approach
SN  - 9780198530145
U1  - 614.4 
PY  - 2007///
CY  - Oxford
PB  - Oxford University Press
KW  - Epidemiology
KW  - Clinical epidemiology
ER  -