United States. Department of the Treasury. "Results of current Treasury Offering, July 30, 1971," in United States. Department of the Treasury. "Volume 174," Press Releases of the United States Department of the Treasury (July 1, 1971 - August 31, 1971) : 243-244. https://fraser.stlouisfed.org/title/6111/item/587017/toc/542350 , accessed on June 25, 2024.