United States. Department of the Treasury. "Weekly Bill Results, July 23, 1973," in United States. Department of the Treasury. "Volume 185," Press Releases of the United States Department of the Treasury (July 2, 1973 - August 31, 1973) : 334-335. https://fraser.stlouisfed.org/title/6111/item/587028/toc/543339 , accessed on July 9, 2024.