United States. Department of the Treasury. "Bill Offering, September 20, 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) : 350-356. https://fraser.stlouisfed.org/title/6111/item/586970/toc/538577 , accessed on June 24, 2024.