United States. Bureau of Economic Analysis. "May 1969, Part II," Survey of Current Business (May 1969). https://fraser.stlouisfed.org/title/46/item/9780, accessed on June 20, 2024.
United States. Bureau of Economic Analysis. "May 1969, Part II," Survey of Current Business (May 1969). https://fraser.stlouisfed.org/title/46/item/9780, accessed on June 20, 2024.