United States. Department of the Treasury. "Report on Sales of Savings Bonds, February 7, 1938," in United States. Department of the Treasury. "Volume 22," Press Releases of the United States Department of the Treasury (December 15, 1937 - April 15, 1938) : 345-357. https://fraser.stlouisfed.org/title/6111/item/586863/toc/567144 , accessed on May 7, 2024.