Release: NBER Macrohistory Database
Source: Bureau Of Labor Statistics, 1919-1930: Bls Bulletin No. 610, Pp. 100, 130-131; 1931-1934: Bls Mimeographed Release, "Revised Index Numbers Of Factory Employment And Payrolls", September 1938; 1935-1939: Bls Mimeographed Release, May 1940; 1940-1942:"Employment And Payrolls" And Monthly Labor Review.
This NBER data series m08130 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08130
National Bureau of Economic Research, Index of Factory Payrolls, Hardware for United States [M08130USM331NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M08130USM331NNBR, April 29, 2017.