Series Is Presented Here As Two Variables--(1)--Original Data, 1919-1941 (2)--Original Data, 1939-1942. 1939-1941 Data Were Adjusted To 1937 Census Levels. Source: Bureau Of Labor Statistics, 1919-1930 Data Are From Bls Bulletin No. 610, Pp. 69-70, 104; 1931-1934 Data Are From Bls Mimeographed Release, "Revised Index Numbers Of Factory Employment Payrolls", September 1938; 1935-1939 Data Are From Bls Mimeographed Report May 1940; 1940-1941 Data Are From "Employment And Payrolls."
This NBER data series m08127a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08127a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Factory Payrolls, Boots and Shoes for United States [M0827AUSM331NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0827AUSM331NNBR, February 11, 2016.