Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, 1919-1940 (2)--Seasonally Adjusted, 1947-1964. Data Cover Twenty-Four Industries. Source: G.H. Moore, Business Cycle Indicators, Vol. 2, NBER
This NBER data series m16056b appears on the NBER website in Chapter 16 at http://www.nber.org/databases/macrohistory/contents/chapter16.html.
NBER Indicator: m16056b
Release: NBER Macrohistory Database
National Bureau of Economic Research, Cumulated Net Diffusion Index, Industrial Production, 16-24 Industries, Six Month Span for United States [M1656BUSM272SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M1656BUSM272SNBR/, July 28, 2015.