Release: NBER Macrohistory Database
Source: Bureau Of Labor Statistics, For 1919-1930 Data: Bulletin No. 610, Pp. 100, 30-31; For 1931-1934 Data: Mimeographed Release Of September 1938, Revised Index Numbers Of Factory Employment And Payrolls; For 1935-1939: Mimeographed Release Of May 1940; For 1940-1942:"Employment And Payrolls" And Monthly Labor Review.
This NBER data series m08106 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08106
National Bureau of Economic Research, Index of Employment, Hardware for United States [M08106USM331NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M08106USM331NNBR, July 17, 2019.