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Browsing Environmental Science Center by Author "Dorgham%2C M. M. %5B%D9%85%D8%AD%D9%85%D8%AF %D9%85%D8%AD%D9%85%D9%88%D8%AF %D8%AF%D8%B1%D8%BA%D8%A7%D9%85%5D"