United States. Bureau of Economic Analysis. "December 1991," Survey of Current Business (December 1991). https://fraser.stlouisfed.org/title/46/item/9840, accessed on May 11, 2024.
United States. Bureau of Economic Analysis. "December 1991," Survey of Current Business (December 1991). https://fraser.stlouisfed.org/title/46/item/9840, accessed on May 11, 2024.