United States. Department of the Treasury. "Bill Offering, June 7, 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) : 113-118. https://fraser.stlouisfed.org/title/6111/item/586969/toc/538486 , accessed on June 20, 2024.