TY  - BOOK
AU  - Webb,Penny
AU  - Bain,Chris
AU  - Pirozzo,Sandi
TI  - Essential epidemiology: an introduction for students and health professionals 
SN  - 0521546613
PY  - 2005///
CY  - New York
PB  - Cambridge University Press
KW  - Epidemiology
KW  - Epidemiologic Research Design
KW  - Epidemiologic Methods
KW  - Public Health
N1  - Includes bibliographical references and index
UR  - http://www.loc.gov/catdir/enhancements/fy0632/2004057005-t.html
ER  -