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by OPEN UNIVERSITY
by Veysey, Laurence R.
by Richard Middleton (The Queen's University, Belfast)
by Thomas H. Wonnacott (University of Western Ontario); Ronald J. Wonnacott (University of Western Ontario)
by Cambridge University Press
by Ralph Fasold (Georgetown University)
by University of Chicago School Mathematic Project
by Hargrove, Erwin C.
by Michael T. Clanchy (University of London)
by Delores M. Etter (University of Colorado, Boulder)
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