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Browsing Environmental Science Center by Author "Tawfiek%2C Samiha Karam %5B%D8%B3%D9%85%D9%8A%D8%AD%D8%A9 %D9%83%D8%B1%D9%85 %D8%AA%D9%88%D9%81%D9%8A%D9%82%5D"