United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 58-58. https://fraser.stlouisfed.org/title/43/item/7350/toc/240186 , accessed on May 6, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "October 1975," Business Conditions Digest (October 1975) : 58-58. https://fraser.stlouisfed.org/title/43/item/7350/toc/240186 , accessed on May 6, 2024.