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Subject
- Geology64
- Mines and mineral resources18
- Nautical charts17
- Coal12
- Quarries and quarrying12
- Harbors11
- Coasts9
- Submarine topography8
- Navigation7
- Continental shelf6
- Geology, Structural6
- Maps6
- Geology, Stratigraphic3
- Marine sediments3
- Roads3
- Banks (Oceanography)2
- Faults (Geology)2
- Lake sediments2
- Administrative and political divisions1
- Coal mines and mining1
