United States. Department of the Treasury. "Bill Tender, June 15, 1965, Release Number f-90," in United States. Department of the Treasury. "Volume 149," Press Releases of the United States Department of the Treasury (June 1, 1965 - July 30, 1965) : 236-237. https://fraser.stlouisfed.org/title/6111/item/586992/toc/539742 , accessed on June 23, 2024.