Release: NBER Macrohistory Database
Source: A.T. & T. - Bureau Of The Census, Original Data 1956-1963
This NBER data series a02134aa appears on the NBER website in Chapter 2 at http://www.nber.org/databases/macrohistory/contents/chapter02.html.
NBER Indicator: a02134aa
National Bureau of Economic Research, Increases in Telephone Wire Mileage for United States [A024AAUSA227NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/A024AAUSA227NNBR, February 17, 2020.