United States. Department of the Treasury. "Revision of Department Circular 230, August 13, 1954," in United States. Department of the Treasury. "Volume 100," Press Releases of the United States Department of the Treasury (May 4, 1954 - August 31, 1954) : 436-437. https://fraser.stlouisfed.org/title/6111/item/586943/toc/536765 , accessed on May 8, 2024.