References
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- U.S. Census Bureau. Geographic areas and rural data. Available online at: gis-portal.data.census.gov/arcgis/apps/MapSeries/index.html?appid=7a41374f6b03456e9d138cb014711e01. Last accessed October 21, 2020.
- U.S. Census Bureau. Maine. Available online at: data.census.gov/cedsci/profile?g=0400000US23. Last accessed October 21, 2020.