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On the renewal of geometry in school. (Zur Erneuerung der Geometrie auf der Schule.) (German)
Math. Semesterber. 63, No. 1, 187-194 (2016).
Reprint of [the author, Semester-Berichte Bonn u. Münster 2, 1‒12 (1932; JFM 59.0071.01)].
Classification: A30 G10 D30
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