United States. Department of the Treasury. "Treasury to issue "strip" of 18 bill Issues, June 2, 1961," in United States. Department of the Treasury. "Volume 126," Press Releases of the United States Department of the Treasury (June 2, 1961 - July 31, 1961) : 3-4. https://fraser.stlouisfed.org/title/6111/item/586969/toc/538480 , accessed on June 23, 2024.