United States. Bureau of Economic Analysis. "September 1970," Survey of Current Business (September 1970). https://fraser.stlouisfed.org/title/46/item/9797, accessed on May 3, 2024.
United States. Bureau of Economic Analysis. "September 1970," Survey of Current Business (September 1970). https://fraser.stlouisfed.org/title/46/item/9797, accessed on May 3, 2024.