Producer Price Indexes for Commodity and Service Groupings and Individual Items
United States. Bureau of Labor Statistics. "Producer Price Indexes for Commodity and Service Groupings and Individual Items," in United States. Bureau of Labor Statistics. "April 2015," PPI Detailed Report (April 2015) : 33-90. https://fraser.stlouisfed.org/title/63/item/494358/toc/505683 , accessed on May 1, 2024.