United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1969," Budget of the United States Government (January 29, 1968). https://fraser.stlouisfed.org/title/54/item/19022, accessed on March 27, 2024.
United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1969," Budget of the United States Government (January 29, 1968). https://fraser.stlouisfed.org/title/54/item/19022, accessed on March 27, 2024.