Secret Service explains variations in $20 bills, May 13, 1963, Release Number d-845
United States. Department of the Treasury. "Secret Service explains variations in $20 bills, May 13, 1963, Release Number d-845," in United States. Department of the Treasury. "Volume 136," Press Releases of the United States Department of the Treasury (April 23, 1963 - May 31, 1963) : 329-331. https://fraser.stlouisfed.org/title/6111/item/586979/toc/539140 , accessed on June 23, 2024.