Producer Price Indexes for the Net Output of Selected Industries and Products
United States. Bureau of Labor Statistics. "Producer Price Indexes for the Net Output of Selected Industries and Products," in United States. Bureau of Labor Statistics. "July 1978," PPI Detailed Report (July 1978) : 90-90. https://fraser.stlouisfed.org/title/63/item/21512/toc/135827 , accessed on April 18, 2024.