United States. Bureau of Economic Analysis. "July 1977," Survey of Current Business (July 1977). https://fraser.stlouisfed.org/title/46/item/9674, accessed on May 11, 2024.
United States. Bureau of Economic Analysis. "July 1977," Survey of Current Business (July 1977). https://fraser.stlouisfed.org/title/46/item/9674, accessed on May 11, 2024.