United States. Bureau of Economic Analysis. "August 2009," Survey of Current Business (August 2009). https://fraser.stlouisfed.org/title/46/item/10206, accessed on April 20, 2024.
United States. Bureau of Economic Analysis. "August 2009," Survey of Current Business (August 2009). https://fraser.stlouisfed.org/title/46/item/10206, accessed on April 20, 2024.