United States. Department of the Treasury. "Treasury August Quarterly Financing, July 31, 1991, Release Number nb-1405," in United States. Department of the Treasury. "Volume 309," Press Releases of the United States Department of the Treasury (July 22, 1991 - September 10, 1991) : 192-194. https://fraser.stlouisfed.org/title/6111/item/587152/toc/546123 , accessed on May 18, 2024.