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. "March 2015," PPI Detailed Report (March 2015) : 33-90. https://fraser.stlouisfed.org/title/63/item/492619/toc/504738 , accessed on April 19, 2024.