United States. Department of Commerce. "National Income and Product Accounts : Preliminary Second Quarter 1987 (GNP), Revised Estimates: 1984 Through First Quarter 1987, BEA 87-36,"
United States Department of Commerce News
(July 24, 1987).
https://fraser.stlouisfed.org/title/6148/item/596683, accessed on May 31, 2026.