United States. Bureau of Economic Analysis. "March 1978," Survey of Current Business (March 1978). https://fraser.stlouisfed.org/title/46/item/9682, accessed on March 29, 2024.
United States. Bureau of Economic Analysis. "March 1978," Survey of Current Business (March 1978). https://fraser.stlouisfed.org/title/46/item/9682, accessed on March 29, 2024.