Series Is Presented Here As Two Variables--(1)--Original Data, 1939-1946 (2)--Original Data, 1946-1967. Unadjusted Figures Were Multiplied By Four To Derive Totals At Annual Rates. Source: U.S. Department Of Commerce, Data For 1939-1945: National Income, 1954 Edition, A Supplement To The Survey Of Current Business; Data For 1946: Scb, Issue Of July 1958
This NBER data series q10026a appears on the NBER website in Chapter 10 at http://www.nber.org/databases/macrohistory/contents/chapter10.html.
NBER Indicator: q10026a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Gross Private Domestic Investment, Total for United States [Q1026AUSQ027NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q1026AUSQ027NNBR/, July 5, 2015.