TY  - GEN
AU  - Rothman, Kenneth J.
AU  - Greenland, Sander
TI  - Modern epidemiology
SN  - 9780316757805
AV  - 2nd ed. 
PY  - 1998///
CY  - Philadelphia : 
PB  - Lippincott-Raven
KW  - Epidemiology
KW  - Epidemiologic methods
ER  -