United States. Bureau of Labor Statistics. "May 1998," PPI Detailed Report (May 1998). https://fraser.stlouisfed.org/title/63/item/21751, accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "May 1998," PPI Detailed Report (May 1998). https://fraser.stlouisfed.org/title/63/item/21751, accessed on April 19, 2024.