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Subject
- Geology64
- Mines and mineral resources18
- Nautical charts17
- Coal12
- Quarries and quarrying12
- Coasts9
- Harbors7
- Navigation5
- Maps4
- Geology, Stratigraphic3
- Banks (Oceanography)2
- Faults (Geology)2
- Geology, Structural2
- Roads2
- Administrative and political divisions1
- Coal mines and mining1
- Coastal ecology1
- Counties1
- Economic conditions1
- Gold mines and mining1
