United States. Bureau of Economic Analysis. "Gross National Product: First Quarter 1990 (Preliminary) | Corporate Profits: First Quarter 1990 (Preliminary), BEA 90-19," Bureau of Economic Analysis (BEA) News Releases (May 24, 1990). https://fraser.stlouisfed.org/title/6148/item/596740, accessed on March 17, 2025.