TY  - BOOK
AU  - Merrill,Ray M.
ED  - Timmreck, Thomas C.
TI  - Introduction to epidemiology
SN  - 13:9780763735821
U1  - 614.4 
PY  - 2006///
CY  - London
PB  - Jones and Bartlett publishers
KW  - 1.Epidemiology 2. Epidemiologic methods
ER  -