United States. Bureau of the Budget and United States. Office of Management and Budget. "Analysis of Budget Receipts," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year Ending June 30, 1961," Budget of the United States Government (January 18, 1960) : 981-986. https://fraser.stlouisfed.org/title/54/item/19014/toc/373809 , accessed on May 7, 2024.