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1. Experimental and quasi-experimental designs for generalized causal inference /   Publication: USA : Wadsworth Cengage Learning, 2002 . xxi, 623 p. : Date:2002 Availability: Copies available: Faculty of Earth and Environmental Sciences SEES Collection [BD591 S53] (1), Actions: Add to cart
2. Experimental and Quasi-experimental designs for generalized causal inference /   Publication: Boston : Houghton Mifflin Company, 2002 . xxi, 623 p. : Date:2002 Availability: Copies available: Faculty of Earth and Environmental Sciences SEES Collection [BD591 S33] (1), Actions: Add to cart