United States. Department of the Treasury. "Bill tender on monthly bills (274-day and 365-day bills), June 24, 1969," in United States. Department of the Treasury. "Volume 165," Press Releases of the United States Department of the Treasury (May 6, 1969 - August 29, 1969) : 243-244. https://fraser.stlouisfed.org/title/6111/item/587008/toc/541470 , accessed on June 22, 2024.