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Instructional models in computer-based learning environment 

[proceedings of the NATO Advanced Research Workshop on Inst...  NATO ASI series, Series F, Computer and systems sciences ; 104
Dijkstra, Sanne ; Krammer, Hein P. M. ; Merrie͏̈nboer, Jeroen J. G. van , 1992
Exemplar:  Zentrale:E03 a pae 545 i/442