United States. Department of the Treasury. "Secretary Kennedy scheduled to go to Europe, November 28, 1969," in United States. Department of the Treasury. "Volume 167," Press Releases of the United States Department of the Treasury (November 7, 1969 - January 30, 1970) : 167-169. https://fraser.stlouisfed.org/title/6111/item/587010/toc/541590 , accessed on June 23, 2024.