United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 1992," PPI Detailed Report (June 1992) : 3-4. https://fraser.stlouisfed.org/title/63/item/21680/toc/96701 , accessed on May 1, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "June 1992," PPI Detailed Report (June 1992) : 3-4. https://fraser.stlouisfed.org/title/63/item/21680/toc/96701 , accessed on May 1, 2024.