United States. Department of the Treasury. "Letter from Secretary David F. Houston to Joseph W. Fordney, March 1, 1920," in United States. Department of the Treasury. "Volume 1A," Press Releases of the United States Department of the Treasury (March 30, 1918 - December 26, 1921) : 115-122. https://fraser.stlouisfed.org/title/6111/item/586836/toc/557993 , accessed on September 21, 2023.