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Subject
- Nautical charts10
- Discoveries in geography6
- Discovery and exploration6
- Maps6
- Discovery and exploration, Russian3
- Marine sediments3
- Russian3
- Seismic prospecting2
- Travel2
- Aeronautical charts1
- Campaigns1
- Continental margins1
- Explorers1
- Geology1
- Geology, Structural1
- Gravity1
- Islands1
- Marine mineral resources1
- Military geography1
- Mines and mineral resources1
