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Subject
- United States. Congress. House13
- Election districts9
- Atlases7
- Geology, Stratigraphic7
- Stratigraphic correlation6
- Census districts3
- Geology3
- Historical geography3
- Oil-shales3
- Roads3
- United States. Congress3
- Formations (Geology)2
- Gravity anomalies2
- Groundwater2
- Human geography2
- Physical geography2
- Architecture1
- Braun, Georg, 1540 or 1541-16221
- Carpatho-Rusyns1
- Cartography1