For Further Information See Source. Source: Manuel Gottlieb, "Long Swings In Urban Development, " Table E-9
This NBER data series a02291 appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02291
Release: NBER Macrohistory Database
National Bureau of Economic Research, Number of Mortgage Instruments Recorded, Town Lot Mortgages for Ohio [A02291US000OHA155NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/A02291US000OHA155NNBR/, September 4, 2015.