United States. Department of the Treasury. "H. J. Hintgen names new Commissioner of the Public Debt, July 2, 1971," in United States. Department of the Treasury. "Volume 174," Press Releases of the United States Department of the Treasury (July 1, 1971 - August 31, 1971) : 6-7. https://fraser.stlouisfed.org/title/6111/item/587017/toc/542306 , accessed on June 25, 2024.