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		Quasi-experimentation: Design & analysis issues for field settings. by Cook T D \| Campbell D T. Material type: Text; Format: print ; Literary form: Not fiction Language: eng. Publication details: Boston Houghton Mifflin, 1979Availability: Not available: WHO Library: Lost (1). Add to cart (remove)
		Experimental and quasi-experimental design for research. by Campbell D T \| Stanley J C. Material type: Text; Format: print ; Literary form: Not fiction Language: eng. Publication details: Boston Houghton Mifflin Company, 1963Availability: Not available: WHO Library: Lost (1). Add to cart (remove)

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