Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Revenues, Expenses, and Income of Class I Railroads," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "March 1950," Federal Reserve Bulletin (March 1950) : 95-95. https://fraser.stlouisfed.org/title/62/item/21183/toc/164644 , accessed on April 19, 2024.