United States. Department of the Treasury. "Bill Tender, September 4, 1965, Release Number f-181," in United States. Department of the Treasury. "Volume 150," Press Releases of the United States Department of the Treasury (August 3, 1965 - September 29, 1965) : 318-320. https://fraser.stlouisfed.org/title/6111/item/586993/toc/539833 , accessed on June 23, 2024.