Subject
- Police28
- Trade routes28
- Astrology--Early works to 180027
- Finance27
- Jurisdiction27
- Maps27
- Medicine, Medieval27
- Air force26
- Ammunition26
- Concessions, Oil, Kuwait26
- Military aviation26
- Alliances25
- Food supply25
- International trade25
- Maritime transport25
- Political information25
- Voyages and travels25
- Bolshevism24
- Building construction24
- Building maintenance24