United States. Bureau of the Budget and United States. Office of Management and Budget. "Relation of Budget Authority to Outlays," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1981," Budget of the United States Government (January 28, 1980) : 571-571. https://fraser.stlouisfed.org/title/54/item/19035/toc/100112 , accessed on April 19, 2024.