United States. Bureau of Economic Analysis. "State Economic Growth Widespread in 2006 : Full Release : Advance 2006 and Revised 2003-2005 GDP-by-State Estimates, BEA 07-24," Bureau of Economic Analysis (BEA) News Releases (June 7, 2007). https://fraser.stlouisfed.org/title/6148/item/598965/content/pdf/bea_newsreleases_20070607_release, accessed on March 26, 2025.