United States. Department of the Treasury. "Bill tender on 365-day Treasury bills, July 12, 1961," in United States. Department of the Treasury. "Volume 126," Press Releases of the United States Department of the Treasury (June 2, 1961 - July 31, 1961) : 394-397. https://fraser.stlouisfed.org/title/6111/item/586969/toc/538510 , accessed on June 24, 2024.