United States. Bureau of Labor Statistics. "September 1998," PPI Detailed Report (September 1998). https://fraser.stlouisfed.org/title/63/item/21755, accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "September 1998," PPI Detailed Report (September 1998). https://fraser.stlouisfed.org/title/63/item/21755, accessed on March 28, 2024.