Price Indexes and Percent Changes for Total Railroad Freight and Selected STCC Groups
United States. Bureau of Labor Statistics. "Price Indexes and Percent Changes for Total Railroad Freight and Selected STCC Groups," in United States. Bureau of Labor Statistics. "December 1980," PPI Detailed Report (December 1980) : 75-75. https://fraser.stlouisfed.org/title/63/item/21541/toc/232298 , accessed on May 13, 2024.