United States. Department of the Treasury. "Memo to the Press: re: tax shelters, June 4, 1973," in United States. Department of the Treasury. "Volume 184," Press Releases of the United States Department of the Treasury (April 27, 1973 - June 29, 1973) : 628-629. https://fraser.stlouisfed.org/title/6111/item/587027/toc/543260 , accessed on June 25, 2024.