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Browsing Environmental Science Center by Author "Hassan%2C H. N. A. %5B%D8%AD%D8%B3%D9%86 %D9%86%D8%AC%D9%8A%D8%A8 %D8%A7%D8%AD%D9%85%D8%AF %D8%AD%D8%B3%D9%86%5D"