United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1993," PPI Detailed Report (May 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21692/toc/76696 , accessed on April 19, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1993," PPI Detailed Report (May 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21692/toc/76696 , accessed on April 19, 2024.