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Which knowledge have children of the (french) sixth form on elementary multiplicative structures. An investigation. Welches Wissen haben Kinder aus der (franz.) 6. Klasse ueber elementare multiplikative Strukturen. Eine Untersuchung(Quelles connaissances les enfants de sixieme ont-ils des structures multiplicatives elementaires. Un sondage). (English)
Bull. Assoc. Prof. Math. Enseign. Publ. (Apr 1978) v. 57(313) p. 331-357.
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