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 1933," Federal Reserve Bulletin (March 1933) : 40-40. https://fraser.stlouisfed.org/title/62/item/20635/toc/328117 , accessed on July 10, 2024.