United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "July 1976," Business Conditions Digest (July 1976) : 77-77. https://fraser.stlouisfed.org/title/43/item/7359/toc/244140 , accessed on May 4, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "July 1976," Business Conditions Digest (July 1976) : 77-77. https://fraser.stlouisfed.org/title/43/item/7359/toc/244140 , accessed on May 4, 2024.