United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "May 1973," Business Conditions Digest (May 1973) : 2-2. https://fraser.stlouisfed.org/title/43/item/7321/toc/34316 , accessed on April 24, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "May 1973," Business Conditions Digest (May 1973) : 2-2. https://fraser.stlouisfed.org/title/43/item/7321/toc/34316 , accessed on April 24, 2024.