Source: Computed By NBER From Series (Average Hours Of Work Per Week In Nonagricultural Employment) And Series (Persons At Work In Nonagricultural Industries).
This NBER data series m08306 appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08306
Release: NBER Macrohistory Database
National Bureau of Economic Research, Manhours In Nonfarm Industries, Persons At Work for United States [M08306USM420NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M08306USM420NNBR/, October 10, 2015.