Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Utility Output of Electricity and Gas," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "December 1956," Federal Reserve Bulletin (December 1956) : 86-86. https://fraser.stlouisfed.org/title/62/item/21264/toc/111749 , accessed on May 9, 2024.