Subject
- Trade (practice)262
- Colonial administration247
- Second World War (1939-1945)244
- Diplomacy209
- Reports199
- Marine navigation192
- Treaties177
- Weather168
- Military intelligence166
- Ships logs162
- International relations160
- First World War (1914-1918)142
- Bilateral relations124
- Concessions111
- Boundary disputes103
- Military operations103
- Railways102
- Petroleum industry101
- Boundaries98
- Frontiers97