United States. Office of Management and Budget. "Percentage Composition of Receipts by Source," in United States. Office of Management and Budget. "Fiscal Year 1992," Historical Tables, Budget of the United States Government (February 4, 1991) : 24-24. https://fraser.stlouisfed.org/title/383/item/6418/toc/394057 , accessed on April 24, 2024.