Source: Federal Reserve Board, Data For 1929-1939: Federal Reserve Bulletin, June 1955; Data For 1940-1959: "Consumer Credit, " A Supplement To Banking And Monetary Statistics, Section 16 (New); Data For 1960-1967 Data: Bulletin, December 1968; For 1968: Monthly Bulletins
This NBER data series m10176 appears on the NBER website in Chapter 10 at http://www.nber.org/databases/macrohistory/contents/chapter10.html.
NBER Indicator: m10176
Release: NBER Macrohistory Database
National Bureau of Economic Research, Automobile Installment Credit Extensions for United States [M10176USM144NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M10176USM144NNBR/, July 28, 2015.