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. "August 1987," Federal Reserve Bulletin (August 1987) : 101-102. https://fraser.stlouisfed.org/title/62/item/20783/toc/317132 , accessed on July 13, 2024.