United States. Department of the Treasury. "Bill Tender, December 27, 1965, Release Number f-317," in United States. Department of the Treasury. "Volume 152," Press Releases of the United States Department of the Treasury (December 1, 1965 - January 31, 1966) : 370-372. https://fraser.stlouisfed.org/title/6111/item/586995/toc/539896 , accessed on June 18, 2024.