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 1989," Historical Tables, Budget of the United States Government (February 18, 1988) : 370-384. https://fraser.stlouisfed.org/title/383/item/6415/toc/53517 , accessed on April 18, 2024.