United States. Department of Commerce and United States. Bureau of Economic Analysis. "Fourth Quarter 1973," The National Income and Product Account (1974-03-01). https://fraser.stlouisfed.org/title/52/item/57437, accessed on April 25, 2024.
United States. Department of Commerce and United States. Bureau of Economic Analysis. "Fourth Quarter 1973," The National Income and Product Account (1974-03-01). https://fraser.stlouisfed.org/title/52/item/57437, accessed on April 25, 2024.