United States. Bureau of Economic Analysis. "September 1980," Survey of Current Business (September 1980). https://fraser.stlouisfed.org/title/46/item/9980, accessed on April 19, 2024.
United States. Bureau of Economic Analysis. "September 1980," Survey of Current Business (September 1980). https://fraser.stlouisfed.org/title/46/item/9980, accessed on April 19, 2024.