Industry and Industry-Classified Product Indexes Deleted from the Producer Price Index
United States. Bureau of Labor Statistics. "Industry and Industry-Classified Product Indexes Deleted from the Producer Price Index," in United States. Bureau of Labor Statistics. "July 1991," PPI Detailed Report (July 1991) : 218-220. https://fraser.stlouisfed.org/title/63/item/21669/toc/225849 , accessed on April 25, 2024.