TY  - BOOK
AU  -  Friis Robert H.
TI  - Epidemiology for public health practice:  student study guide
SN  - 9781449612573
U1  - 614.4 FRI 
PY  - 2011///
CY  - Sudbury : 
PB  - Jones and Bartlett Publishers, 
KW  - Epidemiology
KW  - public health
KW  - Problems and exercises
ER  -