Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Group Index Numbers - Canada, Department of Labor," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1921," Federal Reserve Bulletin (October 1921) : 86-86. https://fraser.stlouisfed.org/title/62/item/20528/toc/348995 , accessed on April 16, 2024.