TY  - GEN
AU  - Merrill, Ray M.
TI  - Introduction to epidemiology
SN  - 9780763766221
U1  - 614.4 
PY  - 2010///
CY  - Boston
PB  - Jones and bartlett publishers
KW  - Medicine
KW  - epidemiology
KW  - Preventive medicine
ER  -