Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Long Distance Business Wired Telephone and Other Toll Service (WPS371202)

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 [WPS371202], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPS371202, .