TY  - BOOK
AU  - Norell, Staffan E.
TI  - A Short course in epidemiology
SN  - 0881678422
PY  - 1992///
CY  - New York
PB  - Raven Press
KW  - Case-control studies
KW  - Cohort studies
KW  - Research design
N1  - Acc. No. 11409
ER  -