United States. Department of the Treasury. "Letter from Commissioner of Customs to Collector of Customs, January 5, 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) : 29-33. https://fraser.stlouisfed.org/title/6111/item/586853/toc/566518 , accessed on September 30, 2023.