United States. Bureau of Economic Analysis. "Gross National Product: Third Quarter 1990 (Final) | Corporate Profits: Third Quarter 1990 (Revised), BEA 90-57,"
Bureau of Economic Analysis (BEA) News Releases
(December 19, 1990).
https://fraser.stlouisfed.org/title/6148/item/596784, accessed on June 18, 2025.