TY  - GEN
AU  - Freedman, David
AU  - Pisani, Robert     
AU  - Purves, Roger     
TI  - Statistics
SN  - 0393970833
U1  - 519.5 
PY  - 1978///
CY  - New York
PB  - W.W.Norton & Company
KW  - Statistics,Observational studies
ER  -