Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industrial Production, by Industries," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1930," Federal Reserve Bulletin (May 1930) : 16-16. https://fraser.stlouisfed.org/title/62/item/20701/toc/222505 , accessed on March 28, 2024.