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Browsing by Author "El%20Sayed,%20Abdel%20Moktader%20A.%20%5B%D8%B9%D8%A8%D8%AF%20%D8%A7%D9%84%D9%85%D9%82%D8%AA%D8%AF%D8%B1%20%D8%B9%D8%A8%D8%AF%20%D8%A7%D9%84%D8%B9%D8%B2%D9%8A%D8%B2%20%D8%A7%D9%84%D8%B3%D9%8A%D8%AF%5D"