Subject
- Telegraph lines3
- Agriculture2
- Colonial administration2
- Gazetteers2
- Irrigation2
- Meteorological data2
- Military intelligence2
- Trade (practice)2
- Tribes2
- Armed forces1
- Bilateral relations1
- Boundary disputes1
- Customs duty1
- Diplomacy1
- Foreign relations1
- Geographical data1
- Geography1
- Human settlements1
- Imperialism1
- Petroleum industry1