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دليل المستخدم
Khalil، A.، و Kattan، J. (1995). An Evaluation Study of the English Syllabus "Petra" Used at the Eighth Ninth and Tenth Grades in the West Bank Government Schools. مجلة جامعة بيت لحم، مج14 ، 75 - 77. مسترجع من http://search.mandumah.com/Record/1558368
Khalil، Aziz، و Jeanne Kattan. "An Evaluation Study of the English Syllabus "Petra" Used At the Eighth Ninth and Tenth Grades in the West Bank Government Schools." مجلة جامعة بيت لحم مج14 (1995): 75 - 77. مسترجع من http://search.mandumah.com/Record/1558368