United States. Department of the Treasury. "Bill tender on 365-day Treasury bills, April 13, 1960," in United States. Department of the Treasury. "Volume 121," Press Releases of the United States Department of the Treasury (April 1, 1960 - June 30, 1960) : 64-68. https://fraser.stlouisfed.org/title/6111/item/586964/toc/538178 , accessed on June 24, 2024.