United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "January 1978," Business Conditions Digest (January 1978) : 87-87. https://fraser.stlouisfed.org/title/43/item/7378/toc/204114 , accessed on May 5, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "January 1978," Business Conditions Digest (January 1978) : 87-87. https://fraser.stlouisfed.org/title/43/item/7378/toc/204114 , accessed on May 5, 2024.