United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1978," Business Conditions Digest (September 1978) : 2-2. https://fraser.stlouisfed.org/title/43/item/7385/toc/42112 , accessed on March 29, 2024.
United States. Bureau of the Census. "Title Page," in United States. Bureau of the Census. "September 1978," Business Conditions Digest (September 1978) : 2-2. https://fraser.stlouisfed.org/title/43/item/7385/toc/42112 , accessed on March 29, 2024.