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2
-
Educational research : a structure for inquiry / Charles D. Hopkins.
- 370.72 H7932
- Hopkins, Charles D.
- C.E. Merrill Pub. Co.,
- c1976.
- Columbus, Ohio :
-
Educational research : models for analysis and application / L.R. Gay.
- 370.72 G2851e
- Gay, L. R.
- Merrill,
- c1976.
- Columbus, Ohio :