United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2004," PPI Detailed Report (April 2004) : 3-4. https://fraser.stlouisfed.org/title/63/item/21822/toc/175706 , accessed on March 29, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "April 2004," PPI Detailed Report (April 2004) : 3-4. https://fraser.stlouisfed.org/title/63/item/21822/toc/175706 , accessed on March 29, 2024.