Release: NBER Macrohistory Database
Source: Data Furnished Directly To NBER By American Telephone & Telegraph Co.
This NBER data series a02134b appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02134b
National Bureau of Economic Research, Construction Expenditures by the Telephone Industry for United States [A0234BUSA398NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A0234BUSA398NNBR, January 21, 2020.