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Jonassen, D.H.; Grabinger, R.S.: Problems and issues in designing hypertext/hypermedia for learning (1990) 0.08

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Source: Designing hypermedia for learning. NATO advanced research workshop on designing hypertext/hypermedia for learning, Rottenburg, 3.-8.7.1989. Proceedings. Ed.: D.H. Jonassen u. H. Mandl