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- Roads--Connecticut--Maps3
- Geology--United States--Maps2
- Election districts--Maryland--Allegany County--Maps1
- Gas fields--Pennsylvania--Maps1
- Groundwater--Missouri River Watershed--Maps1
- Irrigation--United States--Maps1
- Oil fields--Pennsylvania--Maps1
- Petroleum pipelines--Pennsylvania--Maps1
- Petroleum refineries--Pennsylvania--Maps1
- Railroads--Connecticut--Maps.1
- Real property--Maryland--Baltimore--Maps1
- Roads--Connecticut--Maps.1
