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Browsing Environmental Science Center by Author "Sultan%2C Omar A. A. %5B%D8%B9%D9%85%D8%B1 %D8%B9%D8%A8%D8%AF %D8%A7%D9%84%D8%B3%D8%AA%D8%A7%D8%B1 %D8%B9%D8%A8%D8%AF %D8%A7%D9%84%D8%B1%D8%B2%D8%A7%D9%82 %D8%B3%D9%84%D8%B7%D8%A7%D9%86%5D"