United States. Department of the Treasury. "Treasury transmits request to Congress to extend, June 9, 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) : 194-206. https://fraser.stlouisfed.org/title/6111/item/587008/toc/541455 , accessed on June 22, 2024.