Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Long Distance Business Wired Telephone and Other Toll Service (WPU37120201)

U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Long Distance Business Wired Telephone and Other Toll Service [WPU37120201], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPU37120201, .