TY  - BOOK
AU  - Weiss, Noel S.
AU  - Thomas D. Koepsell
TI  - Epidemiologic Methods: Studying the Occurrence of Illness 
SN  - 9780195314465
U1  - 614.4 
PY  - 2014///
CY  - New York
PB  - Oxford University Press
ER  -