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اسمارت اکادمی ایران - What Abacus Education Ought to Be for the Development of the Right Brain.

What Abacus Education Ought to Be for the Development of the Right Brain.

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Sat 18 Jun 2012 / by Dr. Toshio Hayashi, Doctor of Engineering Professor, Osaka Prefecture University Director, Research Institute for Advanced Science and Technology (RIAST) August 24, 2000