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. "October 1921," Federal Reserve Bulletin (October 1921) : 87-87. https://fraser.stlouisfed.org/title/62/item/20528/toc/349095 , accessed on May 13, 2024.