United States. Department of the Treasury. "Bill Offering, March 30, 1966, Release Number f-420," in United States. Department of the Treasury. "Volume 153," Press Releases of the United States Department of the Treasury (February 1, 1966 - March 30, 1966) : 750-755. https://fraser.stlouisfed.org/title/6111/item/586996/toc/539999 , accessed on June 19, 2024.