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by Nebraska Symposium on Motivation (2001); French, Jeffrey A.; Kamil, Alan C.; et al.
by Melton, Gary B.
by Leger, Daniel W.
by Sonderegger, Theo B.
by Rivers, P. Clayton
by Lavoie, Richard
by Noel, Douglas
by Minnesota Symposium on Learning and Individual Differences; Ackerman, Phillip Lawrence; Cudeck, Robert; et al.
by Richard Lavoie