United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 23-23. https://fraser.stlouisfed.org/title/43/item/7350/toc/240166 , accessed on May 13, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 23-23. https://fraser.stlouisfed.org/title/43/item/7350/toc/240166 , accessed on May 13, 2024.