Series Is Presented Here As Three Variables--(1)--Seasonally Adjusted Data, 1921-1939 (2)--Original Data, 1939-1945 (3)--Seasonally Adjusted Data, 1946-1968. Source: 1939-1945 Data Are From National Income, 1954 Supplement To The Survey Of Current Business
This NBER data series q08282b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: q08282b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Disposable Personal Income for United States [Q0882BUSQ027NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q0882BUSQ027NNBR/, August 28, 2015.