Mellon, Andrew W. (Andrew William), 1855-1937. "Letter from Secretary Mellon to Senator Thomas J. Walsh, March 11, 1928," in United States. Department of the Treasury. "Volume 5," Press Releases of the United States Department of the Treasury (January 9, 1928 - December 20, 1928) : 66-68. https://fraser.stlouisfed.org/title/6111/item/586843/toc/557251 , accessed on April 18, 2024.