TY  - BOOK
AU  - Friis Robert H
AU  - Sellers Thomas A
TI  - Epidemiology for public health practice
SN  - 0-8342-1178-5
U1  - 614.4 
PY  - 1999///
CY  - Maryland
PB  - Aspen
KW  - Epedemiology
KW  - Public health
ER  -