4. 'File 6/10 Foreign Interests: Persian Govt. Affairs, etc and miscellaneous papers re: Persians' Date: 1936/1947 Language: English Geographic region: Iran
5. Coll 30/131 'Persian Gulf. Pearling. American process for the manufacture of cultured pearls' Date: 1936/1936 Language: English Geographic region: Bahrain
6. File 13/7 'Japanese Trawlers for the Persian Gulf' Date: 1938/1938 Language: English Geographic region: Persian Gulf