United States. Department of Commerce and United States. Bureau of Economic Analysis. "Revised Second Quarter 1975," The National Income and Product Account (1975-08-01). https://fraser.stlouisfed.org/title/52/item/57043, accessed on April 19, 2024.
United States. Department of Commerce and United States. Bureau of Economic Analysis. "Revised Second Quarter 1975," The National Income and Product Account (1975-08-01). https://fraser.stlouisfed.org/title/52/item/57043, accessed on April 19, 2024.