United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1971," Budget of the United States Government (February 2, 1970). https://fraser.stlouisfed.org/title/54/item/19025, accessed on May 4, 2024.
United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1971," Budget of the United States Government (February 2, 1970). https://fraser.stlouisfed.org/title/54/item/19025, accessed on May 4, 2024.