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Subject
- Geology21
- Roads9
- Geology, Stratigraphic8
- Coal2
- Mines and mineral resources2
- Paleozoic Geologic Period2
- Physical geography2
- Surveys2
- Topographic maps2
- Administrative and political divisions1
- Aquifers1
- Forest ecology1
- Forest reserves1
- Geological surveys1
- Geology, Structural1
- Groundwater1
- Hydrological stations1
- Hydrology1
- Land use1
- Maps1
