Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Industrial Production and Capacity Utilization for April 1997," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "June 1997," Federal Reserve Bulletin (June 1997) : 33-35. https://fraser.stlouisfed.org/title/62/item/20901/toc/199466 , accessed on March 28, 2024.