Subject
- Economic conditions1
- Fossil fuels1
- French colonies1
- Gas fields1
- Geology, Economic1
- Geology, Structural1
- Humanitarian assistance1
- Italian colonies1
- Italo-Ethiopian War, 1935-19361
- Metallogeny1
- Metamorphism (Geology)1
- Mountain biodiversity conservation1
- Mountain ecology1
- Mountains1
- Nautical charts1
- Oil fields1
- Peace1
- Plebiscite1
- Population1
- Portuguese1
