Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Mortgage Debt Outstanding," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "May 1990," Federal Reserve Bulletin (May 1990) : 184-184. https://fraser.stlouisfed.org/title/62/item/20817/toc/176538 , accessed on April 19, 2024.