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滝沢 武久, 羽鳥 博愛, 国中 四郎, 町田 健一. "664 算数・数学教育における言語媒介の効果(2) : 分数計算能力の発達(教授・学習7,教授・学習)." Annual Convention of the Japanese Association of Educational Psychology 22.0 (1980) 780-781