United States. Bureau of the Budget and United States. Office of Management and Budget. "Detailed Estimates, Narratives, and Schedules on Trust Funds," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year Ending June 30, 1959," Budget of the United States Government (January 13, 1958) : 893-931. https://fraser.stlouisfed.org/title/54/item/19012/toc/129312 , accessed on April 23, 2024.