United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "June 1976," Business Conditions Digest (June 1976) : 19-19. https://fraser.stlouisfed.org/title/43/item/7358/toc/71604 , accessed on April 27, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "June 1976," Business Conditions Digest (June 1976) : 19-19. https://fraser.stlouisfed.org/title/43/item/7358/toc/71604 , accessed on April 27, 2024.