TY  - BOOK
AU  - ASCHENGRAU, ANN
TI  - ESSENTIALS OF EPLIDEMIOLOGY IN PUBLIC HEALTH 
SN  - 9780763740252
U1  - 613 ASC 
PY  - 2008///
CY  - BOSTON
PB  - JONES & BARTLETT BOSTON 
KW  - PSM
ER  -