United States. Department of the Treasury. "Memo to Correspondents Re: John Caulfield, May 18, 1973," in United States. Department of the Treasury. "Volume 184," Press Releases of the United States Department of the Treasury (April 27, 1973 - June 29, 1973) : 180-189. https://fraser.stlouisfed.org/title/6111/item/587027/toc/543213 , accessed on June 25, 2024.