United States. Bureau of Labor Statistics. "Rubber Products," in United States. Bureau of Labor Statistics. "July 1985," PPI Detailed Report (July 1985) : 65-67. https://fraser.stlouisfed.org/title/63/item/21596/toc/223996 , accessed on May 3, 2024.
United States. Bureau of Labor Statistics. "Rubber Products," in United States. Bureau of Labor Statistics. "July 1985," PPI Detailed Report (July 1985) : 65-67. https://fraser.stlouisfed.org/title/63/item/21596/toc/223996 , accessed on May 3, 2024.