Producer Price Index by Industry: Kaolin, Clay, and Ceramic and Refractory Minerals Mining: Other Clay, Ceramic, and Refractory Minerals, Including Miscellaneous Shale, Fuller's Earth, and Feldspar (PCU2123232123236)

U.S. Bureau of Labor Statistics, Producer Price Index by Industry: Kaolin, Clay, and Ceramic and Refractory Minerals Mining: Other Clay, Ceramic, and Refractory Minerals, Including Miscellaneous Shale, Fuller's Earth, and Feldspar [PCU2123232123236], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/PCU2123232123236, .