United States. Bureau of Economic Analysis. "January 1970," Survey of Current Business (January 1970). https://fraser.stlouisfed.org/title/46/item/9789, accessed on June 21, 2024.
United States. Bureau of Economic Analysis. "January 1970," Survey of Current Business (January 1970). https://fraser.stlouisfed.org/title/46/item/9789, accessed on June 21, 2024.