United States. Bureau of Economic Analysis. "Survey of Current Business June 1987," Bureau of Economic Analysis (BEA) News Releases (May 19, 1987). https://fraser.stlouisfed.org/title/6148/item/596665, accessed on July 17, 2024.
United States. Bureau of Economic Analysis. "Survey of Current Business June 1987," Bureau of Economic Analysis (BEA) News Releases (May 19, 1987). https://fraser.stlouisfed.org/title/6148/item/596665, accessed on July 17, 2024.