United States. Department of the Treasury. "Bill Tender, October 30, 1956," in United States. Department of the Treasury. "Volume 108," Press Releases of the United States Department of the Treasury (September 1, 1956 - December 29, 1956) : 174-178. https://fraser.stlouisfed.org/title/6111/item/586951/toc/537212 , accessed on June 25, 2024.