United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1989," Business Conditions Digest (October 1989) : 90-90. https://fraser.stlouisfed.org/title/43/item/7518/toc/370568 , accessed on May 10, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1989," Business Conditions Digest (October 1989) : 90-90. https://fraser.stlouisfed.org/title/43/item/7518/toc/370568 , accessed on May 10, 2024.