United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1988," Business Conditions Digest (August 1988) : 90-90. https://fraser.stlouisfed.org/title/43/item/7504/toc/391882 , accessed on May 8, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1988," Business Conditions Digest (August 1988) : 90-90. https://fraser.stlouisfed.org/title/43/item/7504/toc/391882 , accessed on May 8, 2024.