United States. Department of the Treasury. "Bureay of Internal Revenue Regions Reduced from 17 to 9, May 29, 1953," in United States. Department of the Treasury. "Volume 97," Press Releases of the United States Department of the Treasury (May 5, 1953 - August 28, 1953) : 285-292. https://fraser.stlouisfed.org/title/6111/item/586940/toc/569296 , accessed on May 9, 2024.