United States. Bureau of the Budget and United States. Office of Management and Budget. "The Budget Message of the President," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year 1973," Budget of the United States Government (January 24, 1972) : 5-37. https://fraser.stlouisfed.org/title/54/item/19027/toc/420474 , accessed on April 19, 2024.