Series Is Presented Here As Two Variables--(1)--Seasonally Adjusted Data, 1919-1940 (2)--Seasonally Adjusted Data, 1948-1966. This Index Covers Employment In Nonagricultural Establishments, Total Unemployment Rate (Inverted), Index Of Industrial Production, Bank Debits Outside New York City, Personal Income, And Total Retail Sales. Source: U.S. Bureau Of The Census, Economic Research And Analysis Division
This NBER data series m16003a appears on the NBER website in Chapter 16 at http://www.nber.org/databases/macrohistory/contents/chapter16.html.
NBER Indicator: m16003a
Release: NBER Macrohistory Database
National Bureau of Economic Research, Composite Index of Six Roughly Coincident Series, Amplitude-Adjusted, Unweighted for United States [M1603AUSM357SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis https://research.stlouisfed.org/fred2/series/M1603AUSM357SNBR/, August 5, 2015.