United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "July 1986," Business Conditions Digest (July 1986) : 88-88. https://fraser.stlouisfed.org/title/43/item/7479/toc/129656 , accessed on April 25, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "July 1986," Business Conditions Digest (July 1986) : 88-88. https://fraser.stlouisfed.org/title/43/item/7479/toc/129656 , accessed on April 25, 2024.