United States. Department of the Treasury. "Monthly Bill Offering, February 17, 1971," in United States. Department of the Treasury. "Volume 172," Press Releases of the United States Department of the Treasury (February 1, 1971 - March 31, 1971) : 122-124. https://fraser.stlouisfed.org/title/6111/item/587015/toc/542119 , accessed on May 4, 2024.