United States. Office of Management and Budget. "Outlays by Budget Enforcement Act Category," in United States. Office of Management and Budget. "Fiscal Year 2004," Historical Tables, Budget of the United States Government (February 3, 2003) : 103-134. https://fraser.stlouisfed.org/title/383/item/6430/toc/181819 , accessed on May 10, 2024.