United States. Department of Commerce and United States. Bureau of Economic Analysis. "Revised Second Quarter 1963," The National Income and Product Account (1963-08-01). https://fraser.stlouisfed.org/title/52/item/56983, accessed on April 19, 2024.
United States. Department of Commerce and United States. Bureau of Economic Analysis. "Revised Second Quarter 1963," The National Income and Product Account (1963-08-01). https://fraser.stlouisfed.org/title/52/item/56983, accessed on April 19, 2024.