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دليل المستخدم
Gary، N.، و Gary، J. O. (1981). PACKAGING EDUCATIONAL MATERIALS : TOWARDS A SOLUTION TO SOME EGYPTIAN EDUCATIONAL PROBLEMS: A Report on pilot Packaged English Course Taught Via Cassette Tape. مجلة كلية التربية، مج4, ع2 ، 79 - 90. مسترجع من http://search.mandumah.com/Record/668714
Gary، Norman، و Judith O. Gary. "PACKAGING EDUCATIONAL MATERIALS : TOWARDS A SOLUTION TO SOME EGYPTIAN EDUCATIONAL PROBLEMS: A Report On Pilot Packaged English Course Taught Via Cassette Tape." مجلة كلية التربية مج4, ع2 (1981): 79 - 90. مسترجع من http://search.mandumah.com/Record/668714