United States. Department of the Treasury. "Bill offering on 268-Day Tax Anticipation Series, September 12, 1961," in United States. Department of the Treasury. "Volume 127," Press Releases of the United States Department of the Treasury (August 1, 1961 - September 28, 1961) : 280-287. https://fraser.stlouisfed.org/title/6111/item/586970/toc/538563 , accessed on June 24, 2024.