United States. Department of the Treasury. "Contract for Transporting Silver Bars has been Awarded, June 30, 1938," in United States. Department of the Treasury. "Volume 23," Press Releases of the United States Department of the Treasury (April 16, 1938 - July 14, 1938) : 434-441. https://fraser.stlouisfed.org/title/6111/item/586864/toc/567272 , accessed on May 12, 2024.