United States. Department of the Treasury. "Secret Service Year-End Report, August 12, 1951," in United States. Department of the Treasury. "Volume 89," Press Releases of the United States Department of the Treasury (August 2, 1951 - September 28, 1951) : 66-71. https://fraser.stlouisfed.org/title/6111/item/586932/toc/570268 , accessed on March 28, 2024.