United States. Bureau of Economic Analysis. "National Income and Products Accounts : Second Quarter 1997 GDP | Revised Estimates: 1993 Through First Quarter 1997, BEA 97-23," Bureau of Economic Analysis (BEA) News Releases (July 31, 1997). https://fraser.stlouisfed.org/title/6148/item/597649, accessed on March 21, 2025.