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Experimental and quasi-experimental designs for research / Donald T. Campbell, Julian C. Stanley.
- 519.57 C1871
- Campbell, Donald T. 1916-1996,
- Rand McNally & Company,
- Chicago :
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Quasi-experimentation : design & analysis issues for field settings / Thomas D. Cook, Donald T. Campbell.
- 300.72 C7711
- Cook, Thomas D.,
- Rand McNally College Pub. Co.,
- Chicago :