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Geometric activities in modern secondary schools. Geometrische Aktivitaeten in der Hauptschule. (German)
Contributions concerning mathematics teaching. Papers. Beitraege zum Mathematikunterricht. Vortraege. Compiler(s): Becker, G. Bad Salzdetfurth: Franzbecker. 1988. p. 49-56 of 347 p. Conference: 22. Bundestagung fuer Didaktik der Mathematik, Wuerzburg (Germany, F.R.), 1-4 Mar 1988 [ISBN 3-88120-184-X]
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