United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 1993," PPI Detailed Report (June 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21691/toc/155403 , accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 1993," PPI Detailed Report (June 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21691/toc/155403 , accessed on March 28, 2024.