United States. Bureau of Labor Statistics. "February 1988," PPI Detailed Report (February 1988). https://fraser.stlouisfed.org/title/63/item/21627, accessed on May 9, 2024.
United States. Bureau of Labor Statistics. "February 1988," PPI Detailed Report (February 1988). https://fraser.stlouisfed.org/title/63/item/21627, accessed on May 9, 2024.