14. Coll 30/191 ‘Persian Gulf. Defence of the Persian Gulf. Establishment of aircraft facilities at Socotra and Salalah (Muscat) and Assembly Port at Masira Bay.’ Date: 1939/1946 Language: English Geographic region: SalalahJiddah IslandMasirah
15. ‘File 2/40 II AIR FACILITIES (CIVIL) MUSCAT. VOLUME II’ Date: 1946/1948 Language: English Geographic region: SalalahMasirah
16. 'File 2/6 KARACHI-ADEN AIR ROUTE. II-A/8' Date: 1942/1943 Language: English Geographic region: SalalahMasirahRas al-Hadd
