Spatial Coverage
- Gasconade County (Mo.)2
- Georgia2
- Hamilton County (Tex.)2
- Illinois2
- Leavenworth County (Kan.)2
- Logan County (Ark.)2
- Maryland2
- Midlands2
- Midlands (England)2
- Mills County (Tex.)2
- Mississippi2
- Montgomery County2
- Montgomery County (Mo.)2
- Nebraska2
- Nevada2
- New England2
- New Mexico2
- North America2
- North Dakota2
- Northeastern States2
