United States. Department of the Treasury. "Steel Trigger Prices Announced, January 3, 1978, Release Number b-621," in United States. Department of the Treasury. "Volume 209," Press Releases of the United States Department of the Treasury (November 14, 1977 - January 18, 1978) : 361-366. https://fraser.stlouisfed.org/title/6111/item/587052/toc/529720 , accessed on May 20, 2024.