Producer Price Index by Industry: Bituminous Coal and Lignite Surface Mining: Processed Bituminous Coal and Lignite from Surface Operations (Wet-Washing or Other Method) (PCU21211121211131)

U.S. Bureau of Labor Statistics, Producer Price Index by Industry: Bituminous Coal and Lignite Surface Mining: Processed Bituminous Coal and Lignite from Surface Operations (Wet-Washing or Other Method) [PCU21211121211131], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PCU21211121211131, .