United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "June 1999," PPI Detailed Report (June 1999) : 5-8. https://fraser.stlouisfed.org/title/63/item/21766/toc/367763 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "June 1999," PPI Detailed Report (June 1999) : 5-8. https://fraser.stlouisfed.org/title/63/item/21766/toc/367763 , accessed on May 4, 2024.