Release: NBER Macrohistory Database
Series Is Presented Here As Two Variables--(1)--Original Data, 1921-1929 (2)--Original Data, 1929-1942. Source: For 1929-1941 Data: U.S. Department Of Labor, Bureau Of Labor Economics, Employment And Payrolls, January 1938 And Following Monthly Issues; For 1942 Data: Bureau Of Labor Statistics, Monthly Labor Review.
This NBER data series m08250b appears on the NBER website in Chapter 8 at http://www.nber.org/databases/macrohistory/contents/chapter08.html.
NBER Indicator: m08250b
National Bureau of Economic Research, Index of Payrolls, Anthracite Mining for United States [M0850BUSM340NNBR], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/M0850BUSM340NNBR, December 9, 2016.