United States. Department of the Treasury. "Bill Offering, February 22, 1972," in United States. Department of the Treasury. "Volume 177," Press Releases of the United States Department of the Treasury (January 3, 1972 - February 29, 1972) : 533-535. https://fraser.stlouisfed.org/title/6111/item/587020/toc/542574 , accessed on July 11, 2024.