United States. Bureau of the Budget and United States. Office of Management and Budget. "Budget Message of the President," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 2008," Budget of the United States Government (February 5, 2007) : 1-2. https://fraser.stlouisfed.org/title/54/item/19054/content/pdf/BUDGET-2008-BUD-4/toc/44934 , accessed on September 11, 2024.