United States. Bureau of Economic Analysis. "Services and Goods Sectors Contribute to Strong Growth in Gross Domestic Product (GDP) by State in 2005 : Advance Estimates of GDP by State for 2005 by NAICS Sector, BEA 06-47,"
Bureau of Economic Analysis (BEA) News Releases
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https://fraser.stlouisfed.org/title/6148/item/598053, accessed on June 16, 2025.