United States. Bureau of Economic Analysis. "June 1967," Survey of Current Business (June 1967). https://fraser.stlouisfed.org/title/46/item/9742, accessed on April 19, 2024.
United States. Bureau of Economic Analysis. "June 1967," Survey of Current Business (June 1967). https://fraser.stlouisfed.org/title/46/item/9742, accessed on April 19, 2024.