United States. Department of the Treasury. "FOR IMMEDIATE RELEASE: Tire valves from West Germany, August 21, 1967," in United States. Department of the Treasury. "Volume 158," Press Releases of the United States Department of the Treasury (June 1, 1967 - August 29, 1967) : 563-564. https://fraser.stlouisfed.org/title/6111/item/587001/toc/540793 , accessed on May 19, 2024.