United States. Department of the Treasury. "Retirement of Frank Burke of the Secret Service, May 29, 1942," in United States. Department of the Treasury. "Volume 41," Press Releases of the United States Department of the Treasury (April 7, 1942 - June 10, 1942) : 239-241. https://fraser.stlouisfed.org/title/6111/item/586884/toc/561164 , accessed on May 10, 2024.