Experimental and quasi-experimental designs for research - Campbell, Donald T. (Donald Thomas), 1916-1996.x; Gage, N. L. (Nathaniel Lees), 1917-2008.; Stanley, Julian C (Boston : Houghton Mifflin, 1963)
Problem and background -- Three pre-experimental designs
"Reprinted from Handbook of research on teaching."
Includes bibliographical references and index
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Keywords: Experimental design; Mathematical models; Models, Theoretical; Research Design