United States. Department of the Treasury. "Letter from Secretary Mellon to President Coolidge, March 3, 1925," in United States. Department of the Treasury. "Volume 3A," Press Releases of the United States Department of the Treasury (January 5, 1924 - December 7, 1925) : 325-332. https://fraser.stlouisfed.org/title/6111/item/586840/toc/558573 , accessed on May 20, 2024.