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On solid geometry - the cube. Pt. 1. Symmetry. Zur raeumlichen Geometrie - der Wuerfel. T. 1. Symmetrisches am Wuerfel. (German)
Math. Sch. (Apr 1992) v. 30(4) p. 231-241. CODEN: MKSCAS [ISSN 0465-3750]
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