United States. Bureau of Economic Analysis. "Local Area Personal Income: 2015 : Highlights: Local Area Personal Income: 2015, BEA 16-61,"
Bureau of Economic Analysis (BEA) News Releases
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https://fraser.stlouisfed.org/title/6148/item/602380/content/pdf/bea_newsreleases_20161117_highlights, accessed on June 15, 2025.