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1
Observational studies
New York : Springer, 2002
2nd ed.Format: Book
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2
Experimental and quasi-experimental designs for generalized causal inference
Boston : Houghton Mifflin, 2001Format: Book
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3
Quasi-experimentation : design & analysis issues for field settings
Chicago : Rand McNally College Pub. Co., 1979Format: Book
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4
Experimental and quasi-experimental designs for generalized causal inference
Belmont, CA : Wadsworth Cengage Learning, 2002Format: Book
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5
Experimental and quasi-experimental designs for research
Chicago : R. McNally, 1966Format: Book
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6
Quasi-experimental approaches; testing theory and evaluating policy.
Evanston [Ill.] Northwestern University Press, 1973Format: Book
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