United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1977," Business Conditions Digest (August 1977) : 51-51. https://fraser.stlouisfed.org/title/43/item/7372/toc/366303 , accessed on March 29, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "August 1977," Business Conditions Digest (August 1977) : 51-51. https://fraser.stlouisfed.org/title/43/item/7372/toc/366303 , accessed on March 29, 2024.