Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1939-1957. This Segment Is Slightly Different From The Nicb One. Even Though It Approximatly Covers The Same Industry, It Includes Products Made From Synthetic Rubber. Source: Bureau Of Labor Statistics, For 1939-1953 Data: "Employment, Hours, And Earnings", Manufacturing Division, Nondurable Goods Division, Rubber Products, Releases Ls53-2339, February 1953 And May 1955; For 1954-1957: "Employment And Earnings, " June 1956 And Following Issues.
This NBER data series m08220b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08220b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Factory Employment, Rubber Products for United States [M0820BUSM592NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0820BUSM592NNBR, February 6, 2016.