United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1975," Business Conditions Digest (January 1975) : 2-2. https://fraser.stlouisfed.org/title/43/item/7341/toc/126741 , accessed on April 19, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "January 1975," Business Conditions Digest (January 1975) : 2-2. https://fraser.stlouisfed.org/title/43/item/7341/toc/126741 , accessed on April 19, 2024.