TY  - BOOK
AU  - Kleinbaum D G
AU  - Kupper L L
AU  - Morgenstern Hal
TI  - Epidemiologic research: principles and quantitative methods
U1  - 614.49 
PY  - 1982///
CY  - Belmont
PB  - California Wadsworth
KW  - Public health
ER  -