Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1947-1954. Source: National Industrial Conference Board; 1920-1931 Data Are From Wages, Hours, And Employment In The United States, 1914-1936, Nicb Studies No. 229, 1936; 1932-1933 Data Are From A Supplement To Nicb Service Letter, June 1938; 1934-1935 Data Are From A Table Furnished By Nicb; 1936-1942 Data Are From The Nicb Management Record, February 1945.
This NBER data series m08212a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08212a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Factory Payrolls, Electrical Equipment for United States [M0812AUSM330NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0812AUSM330NNBR/, September 4, 2015.