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. "May 1942," Federal Reserve Bulletin (May 1942) : 101-101. https://fraser.stlouisfed.org/title/62/item/21045/toc/50443 , accessed on March 29, 2024.