United States. Bureau of Labor Statistics. "July 1990," PPI Detailed Report (July 1990). https://fraser.stlouisfed.org/title/63/item/21658, accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "July 1990," PPI Detailed Report (July 1990). https://fraser.stlouisfed.org/title/63/item/21658, accessed on April 19, 2024.