Subject
- Second World War (1939-1945)159
- Petroleum industry95
- Reports84
- Colonial administration75
- Imports72
- Slave trade68
- Exports66
- Treaties64
- Boundary disputes62
- Shipping57
- Concessions55
- Concessions, Oil, Bahrain48
- Boundaries43
- Trade (practice)43
- Diplomacy42
- Pearl industry and trade41
- Bilateral relations40
- Smuggling40
- Civil aviation38
- Slave emancipation37