United States. Department of the Treasury. "Helvering Calls On Taxpayers To Study Declaration Forms, September 2, 1943," in United States. Department of the Treasury. "Volume 48," Press Releases of the United States Department of the Treasury (August 10, 1943 - October 12, 1943) : 290-303. https://fraser.stlouisfed.org/title/6111/item/586891/toc/565921 , accessed on April 25, 2024.