TY  - BOOK
AU  - Webb,Penny
AU  - Bain,Chris
AU  - Pirozzo,Sandi
TI  - Essential epidemiology: an introduction for students and health professionals. 
SN  - 0521546613 (pbk.)
U1  - 614.4 
PY  - 2005///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Epidemiology
ER  -