United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2001," PPI Detailed Report (May 2001) : 5-8. https://fraser.stlouisfed.org/title/63/item/21787/toc/307832 , accessed on April 25, 2024.
United States. Bureau of Labor Statistics. "Price Movements," in United States. Bureau of Labor Statistics. "May 2001," PPI Detailed Report (May 2001) : 5-8. https://fraser.stlouisfed.org/title/63/item/21787/toc/307832 , accessed on April 25, 2024.