Source: Bureau Of Labor Statistics, For 1932-June 1961 Data: Employment And Earnings Statistics For The United States, 1909-1960, Bls Bulletin No. 1312, 1961; For July, 1961-February, 1962 Data: Employment And Earnings, Monthly.
This NBER data series m08263 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08263
Release: NBER Macrohistory Database
National Bureau of Economic Research, Average Hours of Work Per Week, Production Workers, Manufacturing, Durable Goods for United States [M08263USM065NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08263USM065NNBR/, November 29, 2015.