Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Index of Production of Minerals, by Products," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "October 1929," Federal Reserve Bulletin (October 1929) : 19-19. https://fraser.stlouisfed.org/title/62/item/20694/toc/208961 , accessed on April 23, 2024.