26. ‘File 28/1 K I Defence of oil field and refinery’ Date: 1939/1942 Language: English Geographic region: ʻAwālīBahrain
27. ‘File 28/1 K III Defence of oil field & refinery’ Date: 1942/1948 Language: English Geographic region: ʻAwālīBahrain
28. ‘File 28/1 L I BAPCO refinery guards’ Date: 1939/1942 Language: English Geographic region: Bahrain
30. ‘File 28/1 N II Bahrain oil – production figures’ Date: 1946/1947 Language: English Geographic region: Bahrain
31. ‘File 28/5 I Export licences for shipments of oil from Bahrain’ Date: 1939/1940 Language: English Geographic region: Bahrain
32. ‘File 28/5 II License for export of oil from Bahrain. Rules, Regulations & correspondence’ Date: 1940/1947 Language: English
35. ‘File 28/28-III Military requirements: supply of coke (Bahrain smalls) by BAPCO’ Date: 1945/1946 Language: English