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Cognitive tendencies and abtraction processes in algebra learning. Kognitive Tendenzen und Abstraktionsprozesse beim Algebralernen. (English)
Fifteenth PME conference. Vol. 2. Proceedings. Tagungsband der 15. PME-Konferenz. Bd. 2. Editor(s): Furinghetti, F. (Genoa Univ. (Italy). Dipt. di Matematica) International Group for the Psychology of Mathematics Education 1991. p. 48-55 of 364 p. Available from Genoa Univ. (Italy). Dipt. di Matematica. Conference: 15. Annual Conference of the International Group for the Psychology of Mathematics Education (PME), Assisi (Italy), 29 Jun - 4 Jul 1991
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