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. "October 2001," Federal Reserve Bulletin (October 2001) : 123-123. https://fraser.stlouisfed.org/title/62/item/20953/toc/203435 , accessed on April 19, 2024.