TY  - BOOK
AU  - Webb,Penny
AU  - Bain,Chris
TI  - Essential epidemiology: an introduction for students and health professionals 
T2  - Cambridge medicine
SN  - 9780521177313
PY  - 2011///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Epidemiologic Methods
KW  - Epidemiology
ER  -