TY  - BOOK
AU  - Friis,Robert H.
AU  - Sellers,Thomas A.
TI  - Epidemiology for public health practice
SN  - 0834211785 (pbk.)
U1  - WA 105 
PY  - 1999///
CY  - Gaithersburg, Md.
PB  - Aspen Publishers
KW  - Epidemiology
KW  - Public health personnel
KW  - Public Health
N1  - Includes Index and Appendices
ER  -