United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 1978," PPI Detailed Report (October 1978) : 3-3. https://fraser.stlouisfed.org/title/63/item/21515/toc/161128 , accessed on April 18, 2024.
United States. Bureau of Labor Statistics. "Contents," in United States. Bureau of Labor Statistics. "October 1978," PPI Detailed Report (October 1978) : 3-3. https://fraser.stlouisfed.org/title/63/item/21515/toc/161128 , accessed on April 18, 2024.