United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "July 1990," PPI Detailed Report (July 1990) : 5-7. https://fraser.stlouisfed.org/title/63/item/21658/toc/92487 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "July 1990," PPI Detailed Report (July 1990) : 5-7. https://fraser.stlouisfed.org/title/63/item/21658/toc/92487 , accessed on May 4, 2024.