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دليل المستخدم
Barham، A. I. (2008). An Assessment of the Effectiveness of a Training Programme in Enhancing Students Ability in Mental Mathematics. المجلة التربوية، مج23, ع89 ، 11 - 54. مسترجع من http://search.mandumah.com/Record/681517
Barham، Areej I. "An Assessment of the Effectiveness of a Training Programme in Enhancing Students Ability in Mental Mathematics." المجلة التربوية مج23, ع89 (2008): 11 - 54. مسترجع من http://search.mandumah.com/Record/681517