Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industrial Production - Indexes and Gross Value," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "July 1996," Federal Reserve Bulletin (July 1996) : 126-127. https://fraser.stlouisfed.org/title/62/item/20890/toc/133760 , accessed on April 27, 2024.