United States. Department of the Treasury. "Bill Tender, February 20, 1965, Release Number d-1512," in United States. Department of the Treasury. "Volume 147," Press Releases of the United States Department of the Treasury (February 1, 1965 - March 31, 1965) : 331-339. https://fraser.stlouisfed.org/title/6111/item/586990/toc/539678 , accessed on June 24, 2024.