TY  - BOOK
AU  - de Ayala, R.J.
TI  - Theory and practice of item response theory
SN  - 9781593858698
U1  - 150.287 DEA-T 
PY  - 2009///
CY  - New York
PB  - Guilford Press
KW  - Item response theory
KW  - Social science
KW  - Mathematical models
KW  - Socialsciences
KW  - Statistical methods
KW  - Psychometrics
N1  - includes bibliography and  index
ER  -