Series Is Presented Here As Three Variables--(1)--Seasonally Adjusted Data, 1921-1939 (2)--Original Data, 1939-1945 (3)--Seasonally Adjusted Data, 1946-1968. These Data Are Quarterly Totals At Annual Rates. The Figures Represent Quarterly Totals Multiplied By 4. Source: Unpublished Data From The Files Of Dr. Harold Barger.
This NBER data series q08282a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: q08282a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Disposable Personal Income for United States [Q0882AUSQ027SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q0882AUSQ027SNBR/, July 3, 2015.