United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "April 1974," Business Conditions Digest (April 1974) : 19-19. https://fraser.stlouisfed.org/title/43/item/7332/toc/263394 , accessed on April 23, 2024.
United States. Bureau of the Census. "Foreign Trade," in United States. Bureau of the Census. "April 1974," Business Conditions Digest (April 1974) : 19-19. https://fraser.stlouisfed.org/title/43/item/7332/toc/263394 , accessed on April 23, 2024.