TY  - BOOK
AU  - Kelsey, Jennifer L.
AU  -  Thompson, W. Douglas
AU  - Evans, Alfred S. 
TI  - Methods in observational epidemiology / Jennifer L. Kelsey,  W. Douglas Thompson, Alfred S. Evans
U1  - B 16.51 KEL -3807   
CY  - New York : Oxford University Press, 1986.
KW  - Epidemiology - Research - Methodology
KW  - Epidemiology - Statistical methods
KW  - HEA
ER  -