TY  - BOOK
AU  - Wald,NJ
ED  - Wolfson Institute of Preventive Medicine
TI  - The epidemiological approach: an introduction to epidemiology in medicine
SN  - 1853155845
PY  - 2004///
CY  - London
PB  - Royal Society of Medicine Press, 
KW  - Epidemiology
ER  -