Subject
- Philosophy -- Early works to 180045
- Smuggling45
- Surveys45
- Wireless telegraphy45
- Financial administration44
- Russo-Persian War (1804-1813)44
- Taxation44
- Defence43
- Education43
- Telegraph lines42
- Passports41
- Personnel41
- Airfields40
- Internal politics40
- Visas40
- Coffee39
- Meteorological data38
- Military strategy38
- War (concept)38
- Weapons38