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”Doodles I have drawn” - an introduction to graph theory. ”Ich habe da was hingekritzelt” - ein Zugang zur Graphentheorie. (English)
Mathematics lessons that live. Lebendiger Mathematikunterricht in Beispielen. Editor(s): Avenoso, F.J.; Miller, G.M. Garden City, NY: Matyc Journal. 1978. p. 3-7 of 63 p.
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