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Subject
- City dwellers2
- Counties2
- Geology, Stratigraphic2
- Population density2
- Rural population2
- Urbanization2
- Agriculture1
- Canals1
- Corn1
- Earthquake intensity1
- Earthquake prediction1
- Education1
- Education, Secondary1
- Farm produce1
- Farms, Size of1
- Geology1
- Geology, Structural1
- Great Britain. Colonial Office1
- High school graduates1
- Income1