27. 'File 10/6 A Revision of oil royalties paid to Shaikh of Bahrain by BAPCO' Date: 1949/1950 Language: English
31. 'File 10/9 BAPCO-ARAMCO OIL PIPE LINE FROM MAINLAND TO BAHRAIN' Date: 1944/1949 Language: English Geographic region: Dhahran
34. 'File 10/10 I Bahrain additional area' Date: 1943/1947 Language: English Geographic region: Hawar Islands