Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Index of Ocean Freight Rates," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "April 1923," Federal Reserve Bulletin (April 1923) : 98-98. https://fraser.stlouisfed.org/title/62/item/20547/toc/417416 , accessed on April 26, 2024.