United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "March 1992," PPI Detailed Report (March 1992) : 3-4. https://fraser.stlouisfed.org/title/63/item/21677/toc/296862 , accessed on April 24, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "March 1992," PPI Detailed Report (March 1992) : 3-4. https://fraser.stlouisfed.org/title/63/item/21677/toc/296862 , accessed on April 24, 2024.