TY  - BOOK
AU  - Gordis, Leon 
TI  - Epidemiology/ 
SN  - 1416025308
U1  - 614.4 22
PY  - 2004///
CY  - Philadelphia
PB  - Elsevier Sauders , 
KW  - Epidemiology
KW  - Epidemiology Methods
N1  - Icludes Indexes (p. 327-335)
ER  -