United States. Department of the Treasury. "Treasury reviews the last 2 years, January 20, 1971, Release Number k-572," in United States. Department of the Treasury. "Volume 171," Press Releases of the United States Department of the Treasury (November 2, 1970 - January 29, 1971) : 508-514. https://fraser.stlouisfed.org/title/6111/item/587014/toc/542083 , accessed on May 4, 2024.