United States. Bureau of Economic Analysis. "September 2007," Survey of Current Business (September 2007). https://fraser.stlouisfed.org/title/46/item/10183, accessed on May 4, 2024.
United States. Bureau of Economic Analysis. "September 2007," Survey of Current Business (September 2007). https://fraser.stlouisfed.org/title/46/item/10183, accessed on May 4, 2024.