United States. Bureau of Economic Analysis. "Economic Growth Widespread Across Metropolitan Areas in 2012 : Uses of Statistics : Advance 2012, and Revised 2001-2011 GDP-by-Metropolitan-Area Statistics, BEA 13-42,"
Bureau of Economic Analysis (BEA) News Releases
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https://fraser.stlouisfed.org/title/6148/item/601565/content/pdf/bea_newsreleases_20130917_uses-of-statistics, accessed on May 22, 2025.