United States. Bureau of the Budget and United States. Office of Management and Budget. "Administrative Budget and Trust Fund Receipts," in United States. Bureau of the Budget and United States. Office of Management and Budget. "Fiscal Year Ending June 30, 1967," Budget of the United States Government (January 24, 1966) : 428-428. https://fraser.stlouisfed.org/title/54/item/19020/toc/265603 , accessed on March 28, 2024.