Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "Mortgage Debt Outstanding on Residential Properties," in Board of Governors of the Federal Reserve System (U.S.), 1935- and Federal Reserve Board, 1914-1935. "August 1969," Federal Reserve Bulletin (August 1969) : 105-105. https://fraser.stlouisfed.org/title/62/item/21416/toc/147794 , accessed on March 19, 2024.