Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Wired Telephone Services (WPS371)

U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Telecommunication, Cable, and Internet User Services: Wired Telephone Services [WPS371], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPS371, June 26, 2022.