Sudan 1:250,000, Sudan, Khartoum: Survey Office, 1909, archived from the original on 27 September 2022, retrieved 27 September 2022{{citation}}: CS1 maint: others (link)
Sudan 1:250,000, Sudan, Khartoum: Survey Office, 1909, archived from the original on 27 September 2022, retrieved 27 September 2022{{citation}}: CS1 maint: others (link)