Series Is Presented Here As Two Variables--(1)--Original Data, 1920-1942 (2)--Original Data, 1934-1956. The Previous Nicb Series Is Believed To Be Roughly Comparable To This Series In Industry Coverage. Source: Bureau Of Labor Statistics: For 1934-1952, "Employment, Hours, And Earnings, " Manufacturing Division, Transportation Equipment Group, Automobiles, February 1953 And May 1955 Ls53-2673 Releases; For 1953-1956, See June 1956 Release, Monthly Labor Review, And "Employment And Earnings."
This NBER data series m08201b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08201b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Average Actual Hours of Work Per Week, Automobile Manufacturing for United States [M0801BUSM065NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M0801BUSM065NNBR/, June 28, 2015.