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 1991," PPI Detailed Report (May 1991) : 145-190. https://fraser.stlouisfed.org/title/63/item/21667/toc/396465 , accessed on May 2, 2024.