United States. Department of the Treasury. "Statistics of Income, Section 2," in United States. Department of the Treasury. "Volume 64," Press Releases of the United States Department of the Treasury (October 8, 1946 - January 8, 1947) : 98-121. https://fraser.stlouisfed.org/title/6111/item/586907/toc/562182 , accessed on June 25, 2024.