13. Coll 5/20 ‘Air Route to India – Arab Coast Secn: Negotiations with Trucial Sheikhs’ Date: 1932/1940 Language: English Geographic region: Trucial CoastSharjah
14. File 4949/1912 Pt 3 ‘Abu Musa Wönckhaus Lingah’ Date: 1907/1912 Language: German Geographic region: Abū Mūsá
15. File 4949/1912 Pt 4 ‘Abu Musa – Angelegenheit. 1907.’ Date: 1907/1908 Language: German Geographic region: Abū Mūsá
16. File 4949/1912 Pt 5 Persian Gulf: Abu Musa oxide Date: 1909/1913 Language: German Geographic region: Abū Mūsá