United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1989," Business Conditions Digest (August 1989) : 90-90. https://fraser.stlouisfed.org/title/43/item/7516/toc/192206 , accessed on May 11, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1989," Business Conditions Digest (August 1989) : 90-90. https://fraser.stlouisfed.org/title/43/item/7516/toc/192206 , accessed on May 11, 2024.