United States. Bureau of Labor Statistics. "February 1999," PPI Detailed Report (February 1999). https://fraser.stlouisfed.org/title/63/item/21761, accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "February 1999," PPI Detailed Report (February 1999). https://fraser.stlouisfed.org/title/63/item/21761, accessed on April 19, 2024.