United States. Bureau of Economic Analysis. "February 1978," Survey of Current Business (February 1978). https://fraser.stlouisfed.org/title/46/item/9681, accessed on May 10, 2024.
United States. Bureau of Economic Analysis. "February 1978," Survey of Current Business (February 1978). https://fraser.stlouisfed.org/title/46/item/9681, accessed on May 10, 2024.