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1كتاب
مصطلحات موضوعية: International Telecommunication Union. Constitution., International Telecommunication Union -- Management., Convention of the International Telecommunication Union (1992). 1998 November 6., Convention of the International Telecommunication Union (1992). 2002 October 18., Convention of the International Telecommunication Union (1992). 2006 November 24., Telecommunication -- International cooperation.