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. "May 1978," PPI Detailed Report (May 1978) : 82-82. https://fraser.stlouisfed.org/title/63/item/21510/toc/180308 , accessed on March 29, 2024.