Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Freight-Car Loadings, by Classes," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "November 1948," Federal Reserve Bulletin (November 1948) : 86-86. https://fraser.stlouisfed.org/title/62/item/21167/toc/90061 , accessed on May 11, 2024.