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Spatial Coverage
- Maryland[remove]148
- Virginia17
- West Virginia13
- Pennsylvania11
- Delaware9
- Maryland.4
- États-Unis3
- Montgomery County3
- U.S.3
- Somerset County2
- Allegany County1
- Anne Arundel County1
- Calvert County1
- Caroline County1
- Caroline County (Md.)1
- Caroline County (Va.)1
- Carroll County1
- Charles County1
- Clarke County (Va.)1
- Dorchester County1
