United States. Department of the Treasury. "Bill tender on 160-day T. Bills, October 10, 1963, Release Number d-997," in United States. Department of the Treasury. "Volume 139," Press Releases of the United States Department of the Treasury (October 1, 1963 - November 28, 1963) : 105-122. https://fraser.stlouisfed.org/title/6111/item/586982/toc/539285 , accessed on June 23, 2024.