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Subject
- Geology124
- Mines and mineral resources30
- Navigation14
- Nautical charts13
- Maps11
- Coasts10
- Sediments (Geology)10
- Railroads9
- Administrative and political divisions5
- Gold mines and mining5
- Geology, Stratigraphic4
- Roads4
- Geology, Structural3
- Harbors3
- Land tenure3
- Land use, Rural3
- Mining districts3
- Facsimiles2
- Fossils2
- Gold discoveries2
