United States. President and Council of Economic Advisers (U.S.). "Mortgage Debt Outstanding, by Type of Property and of Financing," in United States. President and Council of Economic Advisers (U.S.). "1977," Economic Report of the President (1977) : 269-269. https://fraser.stlouisfed.org/title/45/item/8148/toc/329678 , accessed on June 8, 2023.