United States. Department of the Treasury. "Financial figures on 40-year and new notes, February 15, 1955," in United States. Department of the Treasury. "Volume 102," Press Releases of the United States Department of the Treasury (January 4, 1955 - March 31, 1955) : 179-196. https://fraser.stlouisfed.org/title/6111/item/586945/toc/536815 , accessed on May 25, 2022.