United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "December 1993," PPI Detailed Report (December 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21698/toc/299101 , accessed on May 9, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "December 1993," PPI Detailed Report (December 1993) : 3-4. https://fraser.stlouisfed.org/title/63/item/21698/toc/299101 , accessed on May 9, 2024.