Appendix B: Distribution of Nonfarm Residential Mortgage Debt Between Owner-Occupied and Rental Housing

Raymond W. Goldsmith and Robert E. Lipsey, Studies in the National Balance Sheet of the United States, Volume 1 (Princeton University Press, 1963), https://www.nber.org/books-and-chapters/studies-national-balance-sheet-united-states-volume-1/appendix-b-distribution-nonfarm-residential-mortgage-debt-between-owner-occupied-and-rental-housing.