United States. Department of the Treasury. "Debt Limitation, July 12, 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) : 397-404. https://fraser.stlouisfed.org/title/6111/item/586969/toc/538511 , accessed on June 24, 2024.