Data Are Estimated From November, 1956-October, 1957. Source: Bureau Of Labor Statistics
This NBER data series m08293 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08293
Release: NBER Macrohistory Database
National Bureau of Economic Research, Index of Aggregate Weekly Manhours In Industry and Construction Activity for United States [M08293USM349NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08293USM349NNBR/, July 29, 2015.