Producer Price Index by Commodity: Intermediate Demand by Production Flow: Inputs to Stage 4 Goods Producers, Services Less Trade, Transportation, and Warehousing (WPSID54121)

U.S. Bureau of Labor Statistics, Producer Price Index by Commodity: Intermediate Demand by Production Flow: Inputs to Stage 4 Goods Producers, Services Less Trade, Transportation, and Warehousing [WPSID54121], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/WPSID54121, .