United States. Department of the Treasury. "Results of Bill Subscriptions, October 15, 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) : 225-226. https://fraser.stlouisfed.org/title/6111/item/586843/toc/557300 , accessed on April 25, 2024.