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. "March 1943," Federal Reserve Bulletin (March 1943) : 56-56. https://fraser.stlouisfed.org/title/62/item/21055/toc/276834 , accessed on April 23, 2024.