United States. Bureau of the Budget and United States. Office of Management and Budget. "Analysis of Budget Expenditures by Purpose," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year Ending June 30, 1958," Budget of the United States Government (January 16, 1957) : 1186-1188. https://fraser.stlouisfed.org/title/54/item/19011/toc/283989 , accessed on March 29, 2024.