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. "March 1958," Federal Reserve Bulletin (March 1958) : 108-108. https://fraser.stlouisfed.org/title/62/item/21279/toc/273607 , accessed on April 19, 2024.