Subject
- Fossil fuels1
- Geology, Stratigraphic1
- Geology, Structural1
- Germanic peoples1
- History, Military1
- Industries1
- Iron industry and trade1
- Iron ores1
- Metamorphism (Geology)1
- Military readiness1
- Military weapons1
- Mineral resources1
- Mines et ressources miniè€res1
- Nautical charts1
- Nuclear energy1
- Occupied territories1
- Oceanographic research ships1
- Oceanography1
- Power resources1
- Quaternary Geologic Period1
