United States. Bureau of Economic Analysis. "January 1967," Survey of Current Business (January 1967). https://fraser.stlouisfed.org/title/46/item/9737, accessed on April 19, 2024.
United States. Bureau of Economic Analysis. "January 1967," Survey of Current Business (January 1967). https://fraser.stlouisfed.org/title/46/item/9737, accessed on April 19, 2024.