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Subject
- Geology56
- Mines and mineral resources23
- Geology, Stratigraphic4
- Administrative and political divisions3
- Cartes2
- Geomagnetism2
- Real property2
- Boundaries1
- Coasts1
- Description and travel1
- Election districts1
- Gas fields1
- Géologie1
- Géologie1
- History1
- Mapa geológico1
- Natural gas pipeline compressor stations1
- Natural gas pipelines1
- Oil fields1
- Petroleum pipelines1
