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. "December 1936," Federal Reserve Bulletin (December 1936) : 82-82. https://fraser.stlouisfed.org/title/62/item/20737/toc/310165 , accessed on April 25, 2024.