United States. Department of the Treasury. "Bill Tender, September 1, 1964, Release Number d-1328," in United States. Department of the Treasury. "Volume 144," Press Releases of the United States Department of the Treasury (August 4, 1964 - September 30, 1964) : 151-155. https://fraser.stlouisfed.org/title/6111/item/586987/toc/539494 , accessed on June 24, 2024.