1. 'File 35/134 IV (A 56) Sur. Ja'alan - Amirs of.' Date: 1931/1932 Language: English Geographic region: AiqaSur
2. 'File 8/21 II MUSCAT STATE AFFAIRS: DEPENDENCIES – SUR (OPERATIONS).' Date: 1932/1934 Language: English Geographic region: SurAiqa
4. File 4640/1928 Pt 2 ‘Muscat Situation at Sur.’ Date: 1926/1931 Language: English Geographic region: SurAiqaSultanate of Muscat and Oman