Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Group Index Numbers - Germany - Federal Statistical Bureau," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "January 1922," Federal Reserve Bulletin (January 1922) : 86-86. https://fraser.stlouisfed.org/title/62/item/20532/toc/190266 , accessed on April 19, 2024.