Evaluation research methods for assessing program effectiveness
| Prif Awdur: | |
|---|---|
| Fformat: | Llyfr |
| Iaith: | English |
| Cyhoeddwyd: |
Englewood Cliffs, N.J.
Prentice-Hall
[c1972].
|
| Cyfres: | Prentice-Hall methods of social science series
|
| Pynciau: |