TY  - BOOK
AU  - Webb,Penny
AU  - Bain,Chris
TI  - Essential epidemiology: an introduction for students and health professionals 
T2  - Cambridge medicine
SN  - 9780521177313 (pbk.)
U1  - 614.4 
PY  - 2011///
CY  - Cambridge
PB  - Cambridge University Press
KW  - Epidemiology
N1  - Includes bibliographical references and index
ER  -