Subject
- Trade (practice)260
- Colonial administration246
- Second World War (1939-1945)244
- Diplomacy209
- Reports198
- Marine navigation190
- Treaties177
- Military intelligence166
- Weather166
- International relations160
- Ships logs160
- First World War (1914-1918)142
- Bilateral relations124
- Concessions111
- Military operations103
- Boundary disputes102
- Railways102
- Petroleum industry101
- Boundaries98
- Frontiers97