United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 1997," PPI Detailed Report (May 1997) : 5-8. https://fraser.stlouisfed.org/title/63/item/21740/toc/288527 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 1997," PPI Detailed Report (May 1997) : 5-8. https://fraser.stlouisfed.org/title/63/item/21740/toc/288527 , accessed on April 25, 2024.