Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1921-1929 (2)--Original Data, 1929-1942. The Indexes Compiled By The Federal Reserve Bank Of Philadelphia Are Based On Sample Figures Obtained From The Anthracite Institute. Source: Indexes On A 1923-1925=100 Base In Table Furnished By The Federal Reserve Bank Of Philadelphia, Department Of Research, Were Converted By NBER To A 1929=100 Base.
This NBER data series m08250a appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08250a
National Bureau of Economic Research, Index of Payrolls, Anthracite Mining for United States [M0850AUSM340NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M0850AUSM340NNBR, September 27, 2016.