Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Federal Reserve Board Indexes of Production, Employment, and Trade," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "September 1927," Federal Reserve Bulletin (September 1927) : 17-17. https://fraser.stlouisfed.org/title/62/item/20669/toc/412463 , accessed on July 14, 2024.