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. "October 1940," Federal Reserve Bulletin (October 1940) : 110-110. https://fraser.stlouisfed.org/title/62/item/21030/toc/293899 , accessed on April 19, 2024.