United States. Department of the Treasury. "Regulations on Acquisition of Silver by the Mints, April 17, 1935," in United States. Department of the Treasury. "Volume 14," Press Releases of the United States Department of the Treasury (December 29, 1934 - May 20, 1935) : 417-418. https://fraser.stlouisfed.org/title/6111/item/586853/toc/566589 , accessed on September 26, 2023.