United States. Department of the Treasury. "Treasury Certificates and Treasury Notes Outstanding, December 16, 1926," in United States. Department of the Treasury. "Volume 4A," Press Releases of the United States Department of the Treasury (January 4, 1926 - December 10, 1927) : 181-182. https://fraser.stlouisfed.org/title/6111/item/586842/toc/558089 , accessed on May 3, 2024.