Producer Price Indexes and Percent Changes for Commodity Groupings and Individual Items
United States. Bureau of Labor Statistics. "Producer Price Indexes and Percent Changes for Commodity Groupings and Individual Items," in United States. Bureau of Labor Statistics. "May 1990," PPI Detailed Report (May 1990) : 140-185. https://fraser.stlouisfed.org/title/63/item/21657/toc/176328 , accessed on April 26, 2024.