United States. Department of the Treasury. "Market Transactions, July 15, 1960," in United States. Department of the Treasury. "Volume 122," Press Releases of the United States Department of the Treasury (July 5, 1960 - September 30, 1960) : 89-95. https://fraser.stlouisfed.org/title/6111/item/586965/toc/538256 , accessed on June 24, 2024.