1986 | ||
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1 | Gerrit C. van der Veer, John van Beek, Guus A. N. Cruts: Learning structured diagrams - effect of mathematical background, instruction and problem semantics. Informatics and Psychology Workshop 1986: 70-88 |
1 | John van Beek | [1] |
2 | Gerrit C. van der Veer | [1] |