United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1994," PPI Detailed Report (May 1994) : 3-4. https://fraser.stlouisfed.org/title/63/item/21704/toc/325496 , accessed on March 28, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "May 1994," PPI Detailed Report (May 1994) : 3-4. https://fraser.stlouisfed.org/title/63/item/21704/toc/325496 , accessed on March 28, 2024.