TY  - BOOK
AU  - Sijtsma,Klaas
AU  - Molenaar,Ivo W
TI  - Introduction to nonparametric item response theory Vol.5
T2  - Cambridge language teaching library
SN  - 0761908137 /
AV  - QA278.8 S579 I5 2002
PY  - 2002///
CY  - Thousand Oaks, Calif.
PB  - SAGE
KW  - Nonparametric statistics
KW  - Item response theory
KW  - Statistical methods
ER  -