United States. Department of the Treasury. "Production of Gold and Silver in the United States, January 21, 1942," in United States. Department of the Treasury. "Volume 39," Press Releases of the United States Department of the Treasury (December 12, 1941 - January 27, 1942) : 346-350. https://fraser.stlouisfed.org/title/6111/item/586882/toc/566359 , accessed on April 19, 2024.