Subject
- Administration2
- Cars2
- Civil aviation2
- Diplomacy2
- International relations2
- Military occupation2
- Agriculture1
- Air transport1
- Airports1
- Armenian commercial networks1
- Colonial administration1
- Euphrates River--Surveys1
- First World War (1914-1918)1
- Foreign policy1
- Freight transport1
- Imperialism1
- Internment1
- Irrigation1
- Landing grounds1
- Military intelligence1