United States. Department of the Treasury. "Bill Tender, November 15, 1960," in United States. Department of the Treasury. "Volume 123," Press Releases of the United States Department of the Treasury (October 4, 1960 - January 18, 1961) : 212-214. https://fraser.stlouisfed.org/title/6111/item/586966/toc/538343 , accessed on June 23, 2024.