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Spatial diagrams. Stereoskopische Bilder(Les anaglyphes). (French)
Processes of geometrisation and visualization. Proceedings. Geometrie und Anschauung(Processus de geometrisation et de visualisation). Proceedings(Compte rendus). Editor(s): Pellerey, M. International Commission for the Study and Improvement of Mathematics Teaching nd . p. 195-201 of 360 p. Conference: 33. CIEAEM meeting on processes of geometrisation and visualization, Verbania Pallanza (Italy), 2-9 Aug 1981
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