1.

図書
図書
1. Making arithmetic meaningful
by Leo J. Brueckner and Foster E. Grossnickle
出版情報: Philadelphia : John C. Winston, c1953
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2.

図書
図書
2. Discovering meanings in elementary school mathematics. 5th ed
Foster E. Grossnickle, Leo J. Brueckner , John Reckzeh
出版情報: New York : Holt, Rinehart and Winston, c1968
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