United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "June 1986," Business Conditions Digest (June 1986) : 88-88. https://fraser.stlouisfed.org/title/43/item/7478/toc/369042 , accessed on March 28, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "June 1986," Business Conditions Digest (June 1986) : 88-88. https://fraser.stlouisfed.org/title/43/item/7478/toc/369042 , accessed on March 28, 2024.