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. "March 1987," Federal Reserve Bulletin (March 1987) : 100-100. https://fraser.stlouisfed.org/title/62/item/20778/toc/403888 , accessed on April 19, 2024.