Office of Geography. Sudan - Egypt (United Arab Republic) BoundaryArkivigite je 2012-02-04 per la retarkivo Wayback Machine Arkivita en 2012-02-04 en la Wayback Machine International Boundary Study #18, Bureau of Intelligence and Research, United States Department of State. (27a de julio, 1962).
Office of Geography. Sudan - Egypt (United Arab Republic) BoundaryArkivigite je 2012-02-04 per la retarkivo Wayback Machine Arkivita en 2012-02-04 en la Wayback Machine International Boundary Study #18, Bureau of Intelligence and Research, United States Department of State. (27a de julio, 1962).