Producer Prices and Price Indexes for Commodity Groupings and Individual Items
United States. Bureau of Labor Statistics. "Producer Prices and Price Indexes for Commodity Groupings and Individual Items," in United States. Bureau of Labor Statistics. "April 1978," PPI Detailed Report (April 1978) : 14-58. https://fraser.stlouisfed.org/title/63/item/21509/toc/189608 , accessed on March 28, 2024.