TY  - BOOK
AU  - Merrill, Ray M.
TI  - Introduction to epidemiology
SN  - 9780763766221
PY  - 2010///
CY  - Sudbury, Ma
PB  - Jones and Bartlett Publishers, 
KW  - Epidemiologic methods
KW  - Epidemiology
N1  - Includes index
ER  -