United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "March 1974," Business Conditions Digest (March 1974) : 19-19. https://fraser.stlouisfed.org/title/43/item/7331/toc/53243 , accessed on April 23, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "March 1974," Business Conditions Digest (March 1974) : 19-19. https://fraser.stlouisfed.org/title/43/item/7331/toc/53243 , accessed on April 23, 2024.