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. "January 1964," Federal Reserve Bulletin (January 1964) : 87-87. https://fraser.stlouisfed.org/title/62/item/21349/toc/354763 , accessed on April 25, 2024.