United States. Office of Management and Budget. "Federal Transactions in the National Income and Product Accounts," in United States. Office of Management and Budget. "Fiscal Year 1992," Historical Tables, Budget of the United States Government (February 4, 1991) : 176-177. https://fraser.stlouisfed.org/title/383/item/6418/toc/394091 , accessed on May 9, 2024.