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Subject
- Geology7
- Counties5
- Election districts3
- Corn2
- Farm produce2
- Farms, Size of2
- Produce trade2
- United States. Congress. House2
- Agriculture1
- City dwellers1
- Folklore1
- Geographical myths1
- Geology, Structural1
- Geothermal resources1
- Historical geography1
- Hydrology1
- Indigenous peoples of North America1
- Oceanography1
- Older people1
- Population density1