United States. Bureau of Labor Statistics. "April 2002," PPI Detailed Report (April 2002). https://fraser.stlouisfed.org/title/63/item/21799, accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "April 2002," PPI Detailed Report (April 2002). https://fraser.stlouisfed.org/title/63/item/21799, accessed on April 25, 2024.