United States. Bureau of Labor Statistics. "Farm Products," in United States. Bureau of Labor Statistics. "July 1988," PPI Detailed Report (July 1988) : 140-141. https://fraser.stlouisfed.org/title/63/item/21632/toc/109877 , accessed on May 4, 2024.
United States. Bureau of Labor Statistics. "Farm Products," in United States. Bureau of Labor Statistics. "July 1988," PPI Detailed Report (July 1988) : 140-141. https://fraser.stlouisfed.org/title/63/item/21632/toc/109877 , accessed on May 4, 2024.