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دليل المستخدم
Al Hammad، K. S.، و Leach، J. (2013). Designing, Implementing and Evaluating A Teaching Sequence About Physical and Chemical Change for Saudi School Students Aged 15-16 (رسالة دكتوراه غير منشورة). University of Leeds، ليدز. مسترجع من http://search.mandumah.com/Record/601772
Al Hammad، Khalid Sulaiman، و John Leach. "Designing, Implementing and Evaluating A Teaching Sequence About Physical and Chemical Change for Saudi School Students Aged 15-16" رسالة دكتوراه. University of Leeds، ليدز، 2013. مسترجع من http://search.mandumah.com/Record/601772