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2
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Educational evaluation : theory and practice / Blaine R. Worthen, James R. Sanders.
- 379.158 W932
- Worthen, Blaine R.
- Charles A. Jones Publishing Co.,
- c1973.
- Worthington, Ohio :
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Educational evaluation : alternative approaches and practical guidelines / Blaine R. Worthen and James R. Sanders.
- 379.154 W932
- Worthen, Blaine R.
- Longman,
- c1987.
- New York :