Release: NBER Macrohistory Database
Source: American Telephone And Telegraph Company, Confidential Report Of October 20, 1932, "Index Of Industrial Activity In The U.S., " For Data Through July, 1932; Thereafter Data Furnished By The Statistical Division Of The American Telephone And Telegraph Company.
This NBER data series m12001 appears on the NBER website in Chapter 12 at http://www.nber.org/databases/macrohistory/contents/chapter12.html.
NBER Indicator: m12001
National Bureau of Economic Research, American Telephone and Telegraph Company Index of Industrial Activity for United States [M12001USM317SNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M12001USM317SNBR, July 23, 2016.