United States. Department of Commerce and United States. Bureau of Economic Analysis. "Second Quarter 1959," The National Income and Product Account (1959-10-01). https://fraser.stlouisfed.org/title/52/item/56914, accessed on March 28, 2024.
United States. Department of Commerce and United States. Bureau of Economic Analysis. "Second Quarter 1959," The National Income and Product Account (1959-10-01). https://fraser.stlouisfed.org/title/52/item/56914, accessed on March 28, 2024.