TY  - BOOK
AU  - Wittrock, M.C. and Willey, David E.
TI  - The evaluation of instruction: : issues and problems
U1  - 371.26 
PY  - 1970///
CY  - London
PB  - ; Holt, Rinehart And Winston
KW  - Assessment
KW  - Education
KW  - Evaluation
ER  -