TY  - BOOK
AU  - Anderson,Sharon
TI  - Statistical methods for comparative studies: techniques for bias reduction 
SN  - 0-471-04838-0
AV  - QA276 .A2 S83
PY  - 1980///
CY  - New York, E.U.A.
PB  - John Wiley & Sons
N1  - Incluye bibliografia
ER  -