United States. Bureau of Economic Analysis. "November 1967," Survey of Current Business (November 1967). https://fraser.stlouisfed.org/title/46/item/9747, accessed on April 20, 2024.
United States. Bureau of Economic Analysis. "November 1967," Survey of Current Business (November 1967). https://fraser.stlouisfed.org/title/46/item/9747, accessed on April 20, 2024.