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by OPEN UNIVERSITY
by Laurillard, Diana
by Hammer, P. I. (CON)
by Bennewitz, Christer; International Conference on Differential Equations and Mathematical Physics (1990 : University of Alabama at Birmingham)
by Hargrove, Erwin C.
by Chidester, David
by Bock, R. Darrell; University of California, Los Angeles Center for Research in evaluatio; Norc (Organization)
by Kibby, Michael R.; Hartley, J. Roger; Kibby, Michael R.
by Ruhle, M.; Evans, A. G.; Ashby, M. F.; et al.
by Halme, Aarne; Koskinen, K.
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