TY  - BOOK
AU  - Madaus George F
TI  - Evaluation models : Viewpoints on educational and human services evaluation
T2  - Evaluation in education and human services,1983
U1  - T:f, M3 
PY  - 1983///
CY  - Boston
PB  - Kluwer-Nijhoff        
KW  -  RESEARCH METHODS
KW  - EDUCATION
ER  -