United States. Office of Management and Budget. "Fiscal Year 1981," Budget Revisions (March 1980). https://fraser.stlouisfed.org/title/387/item/6448, accessed on April 24, 2024.
United States. Office of Management and Budget. "Fiscal Year 1981," Budget Revisions (March 1980). https://fraser.stlouisfed.org/title/387/item/6448, accessed on April 24, 2024.