TY  - BOOK
AU  - Friis, Robert H
AU  - Sellers, Thomas A.
TI  - Epidemiology for public health practice
SN  - 0-8342-1178-5
AV  - RA651 .F75 1999
PY  - 1999///
CY  - Gaithersburg
PB  - Aspen Publishers, 
KW  - Epidemiology
KW  - Public health personnel
ER  -