Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Group Index Numbers - Calcutta, India - Department of Statistics," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1921," Federal Reserve Bulletin (December 1921) : 95-95. https://fraser.stlouisfed.org/title/62/item/20530/toc/149911 , accessed on April 19, 2024.