Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Summary of Credit Market Debt Outstanding," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1991," Federal Reserve Bulletin (May 1991) : 132-132. https://fraser.stlouisfed.org/title/62/item/20828/toc/127931 , accessed on May 10, 2024.