Subject
- Frontiers10
- State visits6
- Bilateral relations3
- Surveys3
- Arms traffic2
- Bilateral agreements2
- Boundaries2
- Colonial administration2
- International relations2
- Maps2
- Migrants2
- Railway lines2
- Refugees2
- Social conflicts2
- Treaties2
- Weapons2
- Administrative reform1
- Aerial navigation1
- Airspace (international law)1
- Anglo-Soviet invasion of Iran (1941)1