United States. Department of the Treasury. "Gold sales (3rd quarter of 1957), December 27, 1957," in United States. Department of the Treasury. "Volume 111," Press Releases of the United States Department of the Treasury (July 30, 1957 - December 30, 1957) : 420-423. https://fraser.stlouisfed.org/title/6111/item/586954/toc/537544 , accessed on June 25, 2024.