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