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Subject
- Maps4
- Geology2
- Geology, Structural2
- Geomorphology2
- Topographic maps2
- Agriculture1
- Azimuthal projection (Cartography)1
- Bathymetric maps1
- Distances, etc1
- Economic assistance1
- Economic conditions1
- Economic geography1
- Fossil fuels1
- Gnomonic projection (Cartography)1
- Gravity anomalies1
- History1
- International relations1
- Natural gas1
- Petroleum1
- Population density1