25. ‘File 86/2 XII (C 54) Bahrain Oil’ Date: 1934/1934 Language: English Geographic region: BahrainSitrah
27. ‘File 28/28-(ii) Military requirements. Purchases from oil companies. Coke’ Date: 1942/1945 Language: English
28. ‘Annex to File 86/2 Bahrain Concession Duplicate’ Date: 1923/1923 Language: English Geographic region: BahrainSitrah
30. Coll 30/152 'Bahrain: Oil: Production of - Monthly Statements of Destination of Shipments' Date: 1937/1948 Language: English Geographic region: Bahrain