Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1939-1957. Source: National Industrial Conference Board, For 1920-1931 Data: "Wages, Hours, And Employment In The United States, 1914-1936", Nicb Studies No. 229, For 1932-1933: Supplement To Nicb Service Letter, June 1938; For 1934-1935: Nicb Economic Record, March 28, 1940; For 1936-1942: Nicb Management Record, January 1945.
This NBER data series m08220a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08220a
National Bureau of Economic Research, Index of Factory Employment, Rubber Products for United States [M0820AUSM330NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M0820AUSM330NNBR, July 26, 2016.