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1كتاب
المؤلفون: Kusunoki, Fusako, Sugimoto, Masanori, Hashizume, Hiromichi
المصدر: Computer Support for Collaborative Learning ; page 491-492 ; ISBN 9781315045467
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2كتاب
المؤلفون: Sugimoto, Masanori, Suthers, Daniel D.
المصدر: Computer Support for Collaborative Learning ; page 677-678 ; ISBN 9781315045467