United States. Bureau of Economic Analysis. "Gross National Product: Second Quarter 1987 (Revised), Corporate Profits: Second Quarter 1987 (Preliminary), BEA 87-40,"
Bureau of Economic Analysis (BEA) News Releases
(August 21, 1987).
https://fraser.stlouisfed.org/title/6148/item/596688, accessed on May 24, 2025.