United States. Department of the Treasury. "Report on Defense Savings Bonds," in United States. Department of the Treasury. "Volume 36," Press Releases of the United States Department of the Treasury (June 21, 1941 - August 12, 1941) : 62-64. https://fraser.stlouisfed.org/title/6111/item/586878/toc/560864 , accessed on May 17, 2024.