Series Is Presented Here As Two Variables--(1)-- Seasonally Adjusted Data, 1921-1946 (2)--Seasonally Adjusted Data, 1947-1970. Source: National Income And Product Accounts Of The United States, 1929-65, Statistical Tables, For 1947-61; 1962, Survey Of Current Business, July, 1967; 1963-1966, Survey Of Current Business, July 1967; 1967, Current Issues.
This NBER data series q04216b appears on the NBER website in Chapter 4 at http://www.nber.org/databases/macrohistory/contents/chapter04.html.
NBER Indicator: q04216b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Gross National Product Implicit Deflator, Total for United States [Q0416BUSQ072SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/Q0416BUSQ072SNBR/, July 28, 2015.